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Most recent Events, Edits and Additions of Specimens to the Galleries

YYYY.MM.DD-## - Gallery - Description of Edits, Additions(Replacements) or Donations.

2013.05.13 - USSR/Soviet - Added OAO Kalibr-Moscow Circular Slide Rule Calculator Photo By Dushan Grujich Collection, Australia
2013.05.13 - Circular - Added OAO Kalibr-Moscow Circular Slide Rule Calculator Photo By Dushan Grujich Collection, Australia
2013.05.13 - KE - Added (Replaced) 4035 Lot453 1915 Finely Divided, and 4080-3 sn352343, 1939-1949 scale set , 4th variation, has Exponent range labels marked with lunate Epsilon symbol (ϵ) on Log Log scales.
2013.05.13 - SR_WhosWho - Inducted Prof. Erhard_Anthes of Germany, Franciscus Johannes Vaes (1867-1943) of The Netherlands, Albert Rohrber (1887-1966) of Germany
2013.05.09 - KE - Added (Replaced) 4088-5 snNone, 4083-3 1955, 4092 1916-1921 (S426), 4091-3 1933, deleted (S252) 4083-3, (S038) 4092-3
2013.05.08 - Nestler - Added 1905 Model No20 Mannheim and 1937 Model No21 Darmstadt
2013.05.08 - Thornton - Added PIC Pocket Slide Rule, Railroad Track style scales, Gift of Phillip Rodley of UpperHut, NZ
2013.05.08 - Blundell - Added Westec Electronics Slide Rule, Gift of Phillip Rodley of UpperHut, NZ
2013.05.08 - British(United Kingdom) - Added Westechno catagory and Westec Electronics Slide Rule (made by BRL/Blundell), Gift of Phillip Rodley of UpperHut, NZ
2013.05.08 - Hemmi - Added early Hemmi 1 (French Export), and Hemmi 80K Electro with two cursors, Gift of Phillip Rodley of UpperHut, NZ
2013.05.08 - Ephemera - Added picture of Hall Hibbard & Clarence "Kelly" Leanord Johnson holding a K&E slide rule. Found by Ingo Elsen in Germany.
2013.05.07 - Rarities - Added George Bousfield's "Vade Mecum Slide Rule" Gifted to ISRM by Phillip Rodley of Upperhut, New Zealand
2013.05.07 - Dietzgen - Added 1746 sm702167 Early Cursor, Gift of Barnara Emmett, Owned by her father William Page Morris
2013.05.06 - SR_Terms/Encyclopedia - Added Koh-I-Noor Hardtmuth and Koh-I-Noor Slide Rules Fabrik Pvt. Ltd
2013.05.05 - Graphoplex - Made minor edits to existing gallery to correct HTML ASCII codes
2013.05.05.02 - New Calculator acquisition - 1982 TI-55-II with 'slide rule' on the box.
2013.05.05.01 - New slide rules acquisition K&E 8" Polyphase 4035 Finely Divided. all glass cursor.
2013.05.04.01 - Received donation of Dietzgen 1746 sn702167 from Barbara Emmett, owned by father W.P Morris. Bio and picture included. Has Deteriorated cursor.
2013.04.26 - Received gift of slide rules purchased by Phillip Rodley in New Zealand

  • 13.04.26.01 - The "Vade Mecum Slide rule" Designed for the timber trade by George Bousfield, Grimsby, Patent 12806
  • 13.04.26.01.M257 - The "Vade Mecum Slide rule" manual
  • 13.04.26.02 - Westec Electronics Slide Rule by Westechno Ltd, Devon England
  • 13.04.26.02.M258 - Westec Electronics Slide Rule manual
  • 13.04.26.02.M259 - Four-Figure Tables by C.Godfrey and A.W.Siddons
  • 13.04.26.03 - PIC A.G.Thortnon pocket slide rule, railroad track divisions, green cardboard sleeve
  • 13.04.26.04 - Hemmi 80K dcFL Electro Slide Rule with two cursors
  • 13.04.26.05 - Hemmi 1 Slide Rulemissing lens in cursors
  • 13.04.26.06 - Rabone No1190 four fold Joint rule
2013.04.23.01 - New acquisition of K&E 4091-3 sn460643 Orig. Owner W.H.Dewitt
2013.04.20.01 - Donations - Received "The Elemental Slyd Rul" slide chart from Dr. Daniel Thomas, South Hadley, MA. Belonged to father Dr. Paul Thomas.
2013.04.13 - SR_Library/Europe - Added M256 Aristo 40128/IWA 09102 Manual
2013.04.13.01 - Calculators - Added 1973 Melcor Answermath SR8 Slide Rule Calculator
2013.04.12.01 - New acquisition of K&E 4092-3 noSN All-Glass Cursor PERFECT. to replace
2013.04.12.02 - New acquisition of Nestler No20 Rietz, Railroad track scales, from Bulgaria
2013.04.11.01 - Acquired Vernon Gold Slide Rule Tie Clasp
2013.04.11 - Calculators - Added Litronix 1602 Solid State Slide Rule
2013.04.11 - Adders - Placed additional information about Lightning Calculators and Addometers.
2013.04.10 - Pickett - Added N4-T and Model 3 Multiphase Log Log donated by Jeff Smith, Fort Atkinson, Wisconson
2013.04.10 - Donations - Received 2 slide rules from Jeff Smith, Fort Atkinson, Wisconson
  • 13.04.10.01 - Pickett N4-T Vector Log Log, belonging to Jeff Smith, LtCol, USAF, Ret.
  • 13.04.10.02 - Pickett Model 3 Multiphase Log Log, snHC037844, belonging to Jeff Smith's father, Robert J. Smith (1923-1997)
2013.04.10 - SR_Library/Books - Added the Oughtred Society Publication "All About Slide Rules"
2013.04.09 - SR WhosWho - Added Phillip Rodley of New Zealand. Collector, Donor and contributor to ISRM.
2013.04.04.01 - New acquisition of Nestler No21 Darmstadt, Railroad track scales, from Arizona
2013.04.03.01 - Aristo - Added Aristo 40128 Universal Pocket Slide Rule (Wire) - ©1965 Dennert & Pape. aka: Universal Rechenschieber (Draht), Règle À Calculer Universal (Fil), Regla De Universal (Alambre)
2013.04.03.02 - Adders - New acquisition of an ADD-A-mite Pocket Calculator with box and Instructions
2013.04.02 - SR_Library/USA - Added (Replaced) M254 Sterling Metric Converter Instructions (M20) donated by Albert Klumpp, Arlington Hts, IL
2013.04.01 - Received donation from Albert Klumpp, Arlington Hts, IL now a Friend of the Museum
2013.04.01 - Received donation from David White now a Friend of the Museum
2013.04.01 - Received donation of two slide rules used and gifted by Albert Klumpp , Arlington Hts, IL
  • 13.04.01.01 - Sterling Metric Converter (yellow slide, white stock) with Manual
  • 13.04.01.02 - Concise Slide Rule and Reference Tables by Sama & Etani with manual
2013.04.01 - KE_Standard - Added N9081-3 photo belonging to Mercury/Gemini Astronaut Gordon Cooper
2013.03.30.01 - Calculators - Added Litronix 1602 slide rule calculator sn46836, acquired through contributions. 2013.03.30 - Rarities - Added Palmer's Computing Scale, 11 inch square. Image from 2009 Phillip Wiess Auctionn
2013.03.30 - British/Stanley - Added Cooper 100 inch slide rule photos, from 2009 Phillip Wiess Auction
2013.03.30 - SR WhosWho - Added William Ford Stanley. Inventor of a dividing Engine and maker of scales, including for Fowler Cylindrical SR
2013.03.29 - Aristo - Added Early D&P ALTONA with split window cursor (Mannhiem), photo contributed by JAcek Szukowski Collection, Poland.
2013.03.29 - Nestler - Added Early Pocket Mannhiem, photo contributed by JAcek Szukowski Collection, Poland.
2013.03.29 - Manuals - Added Controller 75R 110R 200R instructions, National Rechenwalzen Instructions
2013.03.28 - Circular - Added Controller 75R and 110R Calculator Circular Slide Rules each with manuals
2013.03.28 - Germany - Added Controller 75R and 110R Calculator Circular Slide Rules each with manuals
2013.03.27.01 - Acquired Harrow Mark Reducer, Aston & Mander Makers, Soho, England from Chris Miles, Bournemouth, England, UK
2013.03.25 - EastEuro - Added SKALA slide rule images from Giovanni Breda Collection
2013.03.25 - Germany - Added E.O. Richter section, 4 images from Hermann's Catalog and Giovanni Breda Collection
2013.03.24 - EastEuro - Added Logar section and Logar. Darmstatd slide rule, image provided by Giovanni Breda, Italy.
2013.03.22 - EastEuro - Added SKALA cooperative background information.
2013.03.20 - EastEuro - Added photos of Polish slide rules contributed by JAcek Szukowski Collection, Poland.
2013.03.17 - Switzerland - Added National Rechenwalze Modell 20 System Billeter,owned by John William Radu , and partially donated by his grandson Robert A/ Ecker. Included bio's and family photos
2012.03.16 - Associates - Created new folder for JAcek Szukowski
2013.03.15 - New Acquisitions - National Rechenwalze Modell 20 System Billeter, Controller 75R and 110R Calculator Circular Slide Rules each with manuals
  • 13.03.15.01 - National Rechenwalze Modell 20 System Billeter,owned by John William Radu
  • 13.03.15.02 - Controller 75R Circular Slide Rule
  • 13.03.15.03 - Controller 75R Circular Slide Rule
  • M253 Controller 75R and 110R Circular Slide Rule Instructions
  • M254 National Rechenwalze Modell 20 System Billeter Instructions
2013.03.15 - Circular - Added four Controller Calculator Circular Slide Rules
2013.03.15 - Germany - Added four Controller Calculator Circular Slide Rules
2013.03.14 - SR_Library_Europe - Added Nestler Slide Rule Brief Instructions, 4 pages
2013.03.14 - PocketWatch - Added (Replaced) Fowler's Universal Calculator (Replaced Rod Lovett Collection). Obtained through Scott Reynold's Vintage Calculators
2013.03.14 - Circular - Added Miller Dial Circular Slide Rule, Amphenol Circular Slide Rule & RF Smith Chart. The Amphenol donated bt Philip Rodley of New Zealand.
2013.03.14 - SR_WhosWho - Added Albert John Anido (1883-1949) inventor of 'The Anido Slide Rule'.
2013.03.14 - British - Added 'The Anido Slide Rule', designed by Albert John Anido (1883-1949)
2013.03.14 - Pickett - Added N904-ES Trig and Decimal Keeper Speed Rule. Acquired at OS winter meeting
2013.03.13 - EastEuro - Added UGK, Terta, Tehnolemn. Moved from USSR/Soviet gallery. on suggestion by Jacek Szukowski, Poland.
2013.03.13 - Soviet - Deleted UGK, Terta, Tehnolemn and moved to East Europe gallery. on suggestion by Jacek Szukowski, Poland.
2013.03.11 - SRM_Home - Added News and contestant photo of Irvine, TX World (Texas) Slide Rule Champioships (at bottom of page).
2013.03.11 - SRM_Menu - Repaired misdirected links for Gamma, Skala, Logarex and Curta, in manufacture's brands section
2013.03.08 - SR_Library/Books - Added reference and purchasing information to Our Worlwide Knowledge of Calculating Machines by Dr. Detlef Zerfowski
2013.03.08 - SR_WhosWho - Added Dr. Detlef Zerfowski, author of the book Our Worlwide Knowledge of Calculating Machines
2013.03.01 - Rarities - Added reference and link to the Oughtred Society Rarities Gallery
2013.02.26 - Rarities - Added Edward Roberts, Makers, Dove CourtOld Jewry, LONDON, 4-sided Boxwood Rule
2013.02.26 - Lawrence - Added 8-B, donated by Henry Eck, Catonville, Maryland, belonging to a Mary Elizabeth Exley
2013.02.26 - Italy - Added Marcantoni 25RE Electro-Rietz (Ebay acquisition to represent Italy in exhibits.
2013.02.26 - Japan - Added Fuji No201P, Hope 52-G, and Royal 1091, all donated by Phillip Rodley, New Zealand.
2013.02.25 - France - Added Maurice Damien Universal slide rule, donated by Phillip Rodley, New Zealand. Also 3 reference Maurice Damien slide rules from photocalcul.com in France
2013.02.24 - Ephemera - Added picture of students at Gulf H.S. New Port Richey, Florida, Manhattan Project Physicist Enrico and Laura Fermi, and a Lionel-Porter Mastercraft Mathematics set from Carl Schwent Collection
2013.02.23 K&E_Standard - Added(Replaced) 68-1130 (P045) Pocket Decilon in Retail Box, 4095-5 Merchant Rule c1922 all glass frameless cursor. and 4053-5 lot 79 all glass frameless cursor.
2013.02.23 Pickett - Added(Replaced) N600-ES NOS, N600-T red inverse scales Blk Logo, N904-ES, Corrected scale identifyers on N600-T/ES, N3P-ES(P072), N3P-T(P073), N4-T/N600-T Twin Pack (S130)
2013.02.21.01 - Donations - Received Lawrence 8" slide rule donated by Henry Eck, Catonsville, Maryland
2013.02.20 - New Acquisitions - Donations and purchases from Oughtred Society Meeting in since last update.
  • 13.02.20.01 - Marcantoni 25RE
  • 13.02.20.02 - The Anida Slide Rule - acquired on loan from Rose's Vintage Instruments.
  • 13.02.20.03 - Pickett N904-ES TrigExponential with Decimal Keeper
  • 13.02.20.04 - Pickett N4-T/N600-T DualBase LogLog TwinPack
  • 13.02.20.05 - K&E_68-1130 Pocket Decilon in Box
  • 13.02.20.06 - Pickett N3P-ES NOS in Box
  • 13.02.20.07 - Pickett N3P-T NOS in Box
  • 13.02.20.08 - K&E 4095-5 Merchant Rule 1922 sn55071, no cursor (used cursor from 4088-5), Donated by Martha Prince
  • 13.02.20.09 - K&E 4053-5 Polyphase Rule AllGlassFramelessCursor 1915-1922 snNone
  • 13.02.20.10 - Pickett N803-T/N600-T DualRule LogLog TwinPack
  • 13.02.20.11 - Edward Roberts, Makers, Dove CourtOld Jewry, LONDON, 4-sided Boxwood Rule
  • 13.02.20.12 - K&E 4088-5 AllGlassFramelessCursor 1922 lot66, no cursor(added cursor from 4092-3), Donated by Martha Prince
  • 13.02.20.13 - Pickett N600-T Red Inverse Scales
2013.02.16 - SR_WhosWho - Added Martha Prince and Carl Schwent while at Oughtred Society Winter Meeting in Tucson, Arizona.
2013.02.13 - Donations - Received Donation of slide rules from Phillip Rodley of Upper Hutt, New Zealand.
  • 13.02.13.01 - Maurice Daimen Universal SlideRule
  • 13.02.13.02 - Hope 52-G SlideRule
  • 13.02.13.03 - Royal 1091 LogLog
  • 13.02.13.04 - Fuji Quate Log No201P,
  • 13.02.13.05 - Amphenol Circular Slide Rule & RF Smith Chart.
2013.02.09-13 - Display - building displays for a least 4 tables to be seen at the Pima Air Museum on Feb 16.
2013.02.03.03 - Calculators - Added Prinztronic SR88M, acquired through contributions. 2013.02.03.02 - Calculators - Added Litronix 2140, acquired through contributions. 2013.02.03.01 - Calculators - Added Unisonic 738, acquired through contributions. 2013.02.02.01 - Calculators - Added Commodore SR9190R, acquired through contributions. 2013.01.27 - Calculators - Added a over 30 acquistions, from the last three months (see list below) to the gallery, along with exhibit placards, in preparation for an exhibit in Tucson, Arizona.
  • 12.09.24.01 - Faber-Castell TR-2 Slide Rule w/ ESR, sn025120910, INOP, Germany, Scott Reynolds.$300
  • 12.09.24.02 - Fowler's Universal Calculator , Manchester, England, Scott Reynolds.$200
  • 13.01.27.01 - TI-45 sn478125 dc3578RCL, Blue VFD, European version of SR-40, made in Italy. works 9v bat.
  • 13.01.27.02 - Commodore SR7919, sn008053, USA, red LED, 9v bat, works.
  • 13.01.27.03 - Casio J-1 1983, Japan, Electronic Calculator, Min: Sqr Root, VFD, 2 AA works, acquired from Greece
  • 13.01.27.04 - Compex SR-10, Made in Tiawan, Min: Sqr Root, works 2AA.
  • 13.01.27.05 - Melcor SC-535, sn39340, USA, red LED, uses 4 3/5 NiCads (need replaced), untested
  • 13.01.27.06 - Sperry-Remington 809SR, sn2110811, blu VFD, Japan, 5AA works,
  • 13.01.27.07 - Berkey 4030, sn C247165, USA, 2 new AA NiCds, partial display, orange VFD, Scott Reynolds.
  • 13.01.27.08 - Radofin Professional Slide Rule, Model 857, sn10125, HongKong, works w/ 6v jumpered, missing back cover, battery cartridge missing terminal, Scott Reynolds.
  • 13.01.27.09 - Binatone Junior Slide Rule, green VFD digitron, Taiwan, , works 3AA, needs to press cover (battery cartridge) to make contact.,Scott Reynolds.
  • 13.01.27.10 - Commodore SR5190R, sn005434, England, red LED, nicads, INOP using external 420B charger, Scott Reynolds.
  • 13.01.27.11 - Sinclair Scientific, RPN, England, red LED works 4AAA
  • 13.01.27.12 - Enterprex SR-55 Electronic Slide Rule, Green VFD, Tiawan, works 2AA
  • 13.01.27.13 - Commodore SR36, sn05329, England, red LED, nicads, works, Scott Reynolds.
  • 13.01.27.14 - Commodore GL-997R, sn14736, Japan, green VFD, nicads, works on charger, not tested on batteries, Scott Reynolds.
  • 13.01.27.15 - Corvus 310 Electronic Calculator, SN310-151267, red Led, works 4AA
  • 13.01.27.16 - Craig 4521, Japan, Electronic Calculator, Min: Sqr Root, green VFD, 2 AA works
  • 13.01.27.17 - Commodore SR4148R, sn121055, England, red LED, 3 AA nicads, works, Scott Reynolds
  • 13.01.27.18 - Elektronika MK36, USSR, blue vfd, Works partially, with 3 newH320 button cell NMHID batteries, Needs charging, but no charger available.
  • 13.01.27.19 - Teal 826 Memory, sn 408792, Japan,green vfd, works 2AA
  • 13.01.27.20 - Privilig SR53, sn015489, Germany, red LED, works 3AA, Scott Reynolds.
  • 13.01.27.21 - Privilig SR54NC RPN, sn41348, Germany, red LED, works 3AA, Scott Reynolds.
  • 13.01.27.22 - Silver-Reed 80 Electronic Slide Rule, Green VFD, Tiawan, works 1AA
  • 13.01.27.23 - Silver-Reed SR80 Electronic Slide Rule, Green VFD, German Instructions on back, works 2AA
  • 13.01.27.24 - Rockwell 31R Slide Rule Memory, sn 172800, Mexico/usa, works, replaced 2 AA nicads
  • 13.01.27.25 - Casio Memory-8A Electronic Calculator, sqr root, blue vfd, works 2AA bat.
  • 13.01.27.26 - Unisonic 1011 sn025147 Electronic Calculator, sqr root, green vfd, works 4C bat.
  • 13.01.27.27 - Unisonic 767 sn025147 Electronic Calculator, sqr root, green vfd, works 4C bat.
  • 13.02.05.01 - Prinztronic Electronic Calculator, sqr root, green vfd, works 4 AA bat.
2013.01.26 - SR_Menu - Removed "Avergi" from brands. I simply cannot find an image or record of it in the archives.
2013.01.26 - ALRO - Added ALRO 200R Patent Slide Rule and Replaced ALRO-Print Spoorweglawaai 922130 (HSRC0093) technical disk, acquired from David Rance (Netherlands), made possible by a gift from Robert L. Allison of Ballard, Washington.
  • 2013.01.26.01 - ALRO 200R Patent Slide Rule
  • 2013.01.26.02 - ALRO-Print Spoorweglawaai 922130
2013.01.26 - Netherlands - Added RiSta brand to gallery, based on input from David Rance, based on research by Gerard van Gelswijck (Netherlands)
2013.01.26 - Germany/DDR - Moved RiSta entry to the Netherlands Gallery, based on input from David Rance, based on research by Gerard van Gelswijck (Netherlands)
2013.01.11 - Germany/DDR - Added Reiss Rietz 60/0015 donated by Susanne Petersson, bio and family photo. Corrected scales on Reiss Rietz-Spezial 3201
2013.01.11 - SR_Ephemera - Added advertisement from Mar 1936 Popular Mechanics on Civil Engineering Course, including slide rule (Gilson).
2013.01.12 - Slidecharts - Added 9 specimens donated by Michael P. Maloney
2013.01.12 - SR_Terms/Encyclopedia - Added reference to Schooley Engineering Co. Popular Mechanics Mar 1936
2013.01.12 - SR_Library/USA - Added ISRM M252 Fullerton-Acu No 44 Instructions, Donated by Pamela Browne
2013.01.12 - Friends - Added Susanne Petersson, Michael Maloney, and Carolyn (Randall) Diviancchi, and others.
2013.01.12 - SR_Library/Japan - Added ISRM M251, Concise 28N Instruction, donated by Michael Maloney, Lacey, Washington
2013.01.11 - SR_Ephemera - Added seven (7) related photos Found on a web search.
2013.01.11 - Circular - Added (Replaced) Concise 28N SLR from Michael Maloney, Lacey, Washington added bio and photo
2013.01.11 - KE - Added (Replaced) N4053-5 20 inch Polyphase sn 771644 (830192) donated by Carolyn (Randall) Diviacchi, Boston, MA.
2013.01.11 - Sterling - Added(Replaced) Metric Converter (S305) donated by Susanne Petersson, Park Ridge, Illinois. included bio and family photo.
2013.01.11 - Acumath - Added C.V. Ore S-M Slide Rule Ad from Popular Science, May 1956, page 261. Info by George Keane, Festus, Missouri.
2013.01.11 - Lawrence - Added C.V. Ore S-M Slide Rule Ad from Popular Science, May 1956, page 261. Info by George Keane, Festus, Missouri.
2013.01.11 - SR_Ephemera - Added C.V. Ore S-M Slide Rule Ad from Popular Science, May 1956, page 261. Found by George Keane
2013.01.09 - Received donated personal slide rule and slide charts from Michael Maloney, Lacey, Washington
  • M251 - Concise 28N Instruction manual
  • 13.01.09.01 - SRL Promo Concise 28N circular slide rule and case
  • 13.01.09.02 - HP Reflectometer calculator & Mismatch Error Limits Calculator, 1967 Perrygraf Slide Chart
  • 13.01.09.03 - Anzac Amplifier Design Calculator & 3rd Order Intercept & 3rd Order Spurious-Free Dynamic Range, 1978 Perrygraf Slide Chart
  • 13.01.09.04 - HRB-Singer, Receiver Sensitivity and Noise Figure Slide-Rule, 1959 Perrygraf Slide Chart
  • 13.01.09.05 - AEL, Communication System Calculator, 1971 Perrygraf Slide Chart
  • 13.01.09.06 - ARGO Systems, ESM/ELINT System Calculator, 1980 Perrygraf Slide Chart
  • 13.01.09.07 - HP Measurement Error Calculator, 1968 Perrygraf Slide Chart
  • 13.01.09.08 - Collins Radio Company, Space Systems Calculator, 1966 Perrygraf Slide Chart
  • 13.01.09.09 - Telonic Industries, RF Filter Performance Chart Calculator, 1965 Perrygraf Slide Chart
  • 13.01.09.10 - Andrew Microwave Antenna System Computer & Coaxial Transmission Line Selector, 1986 Andrew Corp. Slide Chart
2013.01.08 - Received donated personal slide rules from Susanne Petersson, Park Ridge, Illinois
  • 13.01.08.01 - Sterling Metric Converter
  • 13.01.08.02 - Reiss Rietz (Missing Cursor)
2013.01.07 - Received donated slide rules Owned by Edwin Benjamin Randall, Jr. from Carolyn (Randall) and Valeriano Diviacchi.
  • 13.01.07.01 - K&E 4081-5 20 inch Log Log Duplex decitrig sn082488
  • 13.01.07.02 - K&E N4053-5 20 inch Polyphase sn771644
2013.01.01 - DemoSR - Added Eugene Dietzgen Co 1760 Series Demonstration Slide Rule. Photo provided By Darryl Willis
2012.12.28 - Nordic - Changed name of Denmark/Sweden gallery to Nordic (DK/SE).
2012.12.28 - Australia - Added higher resolution scans of Service Slide Rule model REED, with white paper from David Rance, Netherlands.
2012.12.26 - Switzerland - Created this gallery which contains Kern, LOGA and CURTA.
2012.12.26 - German - Created this gallery from MiscEuro, which contains 17 brands.
2012.12.26 - MiscEuro - Pulled German/DDR, Swiss and CURTA manufacturers and created 2 new galleries, The Germany/DDR and Switzerland (Kern and LOGA) and Liechenstien (CURTA) Manufacturers Switzerland
2012.12.24 - SR_Library_Europe - Added Calculimetre Charpentier Instructions
2012.12.24 - SR_WhosWho - Added Jacobus Ahrend (1875-1956) founder of the J.Ahrend company in the Netherlands.
2012.12.23 - ALRO - Created this exclusive gallery of the Dutch Company ALRO using 53 specimens in Herman's Slide Rule Catalog (HSRC) gallery, found on ISRM
2012.12.23 - Netherlands - Created this gallery from MiscEuro and specimens in Herman's Slide Rule Catalog (HSRC) gallery
2012.12.23 - MiscEuro - Pulled Dutch manufacturers and created 2 new galleries, The Netherlands and Dutch Manufacturer ALRO
2012.12.22 - Italy - Added Marconti 15R, Goliardo, Salmoiraghi Projection Slide Rule, Faviani Calcolina, scans by Andrea Celli, Italy
2012.12.22 - MiscWorld - Split into two new galleries, Orient (East Asia - China, Korea, India) and Americas (Mexico, Brazil, Argentina)
2012.12.20 - SlideCharts - Added Derck's Trig Simple-Fyer Dial and Calculator Specialties Heating Calculator. Donated by Robert L. Allison, Ballard, Washington
2012.12.17 - SRM_Home - Updated gallery links - 45 galleries now!
2012.12.17 - SRM_Menu - Updated main gallery links. Removed 'Misc' from gallery names (in process)
2012.12.17 - Denmark - Building new gallery with images from MiscEuro. DIWA and UTO slide rules are featured.
2012.12.17 - MiscEuro - Moved Danish slide rules to new Denmark gallery
2012.12.17 - France - Building new gallery with images from MiscEuro. Tavenier-Gravet and Marc (with UNIS marks) slide rules are featured.
2012.12.17 - MiscEuro - Moved French slide rules to new France gallery
2012.12.17 - MiscEuro - Added Tavenier-Gravet Model Depose 10-13, Gamma 25R, scans from Giovanni Breda Collection, Italy.
2012.12.16 - SR_Menu - Added Altma, Antica, Azzola, Cellograf, La Filotechnic, Mercantoni, Mathematicus, Orions, Plastigraf, Salmoiraghi, and Teacher. all in Italy.htm
2012.12.16 - Italy - Building new gallery with images from MiscEuro and scans from the Giovanni Breda Collection.
2012.12.16 - MiscEuro - Moved Italian slide rules to new Italy gallery
2012.12.16 - Aristo - Added model 80123 Martin Space Rule 1962, scan provided by Rod Lovette Collection
2012.12.16 - Aerospace - Added Martin Space Rule 1962 Aristo 80123, scan provided by Rod Lovette Collection
2012.12.16 - SR_WhosWho - Added Washington Sabatini (1923-1966) who invented the W. Sabatini Concrete Calculator.
2012.12.16 - MiscEuro - Added C.A. Ferrero Concrete Calculator based on Washington Sabatini's designs. Included reference pictures of earlier versions
2012.12.15 - Ephemera - Added photo from TV screen of Circular Slide Rule In The 2005 Movie "World's Fastest Indian", starring Anthony Hopkins.
2012.12.15 - SR_Terms - Added UNIS - Union Nationale Inter Syndacale. A French organization monitoring the quality of French goods. Contributed by Andrea Celli. Italy.
2012.12.11 - Hemmi - Added(replaced) Model 47, c1932 (Paul Ross Image) slide rule, donated by Robert L. Allison of Ballard, Washington.
2012.12.11 - Nestler - Added(replaced) Model Nr. 0115 Techniker (HRSC gallery image) pocket slide rule, donated by Robert L. Allison of Ballard, Washington.
2012.12.10 - SR_Terms - Added Tamaya & Company entry which sold re-branded Hemmi Slide Rule from 1913-1932
2012.12.10 - Hemmi - Added note at top of page mentioning Tamaya & Company of Tokyo, Japan as another rebranded Hemmi slide rule company.
2012.12.10 - SR_Home - All slide rule specimens, scans, photos and ephemera are now organized into one of 40 galleries;
2012.12.10 - Unique - Created Manufacturer Unique gallery, moved from British Gallery.
2012.12.10 - Blundell - Created Manufacturer Blundell Harling/BRL gallery, moved from British Gallery.
2012.12.10 - Thornton - Created Manufacturer PIC/British Thornton gallery, moved from British Gallery.
2012.12.10 - British - Deleted Manufacturers PIC/British Thornton, Blundell/BRL, and Unique from this gallery, moved to their own Gallery.
2012.12.09 - MiscJapan - Added Manufacturer Jakar (Fuji) to this gallery, moved from British Gallery.
2012.12.09 - British - Deleted Manufacturer Jakar (Fuji) from this gallery, moved to MiscJapan Gallery.
2012.12.09 - Manuals - Added Service Slide Rule, Model REED Instructions, scan by David Rance's Collection at www.sliderules.nl
2012.12.09 - Australia - Added Service Slide Rule, Model REED, from David Rance's Collection at www.sliderules.nl
2012.12.08 - SR_WhosWho - Added Paul Jones (1896-1945), founder of Festus Mfg (1938) which later became Acu-Rule (1940)
2012.12.07 - SR_WhosWho - Added George L. Lockhart, founder of Slide Rule & Scale Engineering Company, 1930-1950, and Paul Jones
2012.12.07 - Manuals/MiscUSA - Added Slide Rule & Scale Company Brick & Tile Computing Slide Rule Instructions, Scan provided by David Rance, The Netherlands
2012.12.07 - MiscUSA/SR&SECo - Added Slide Rule & Scale Company Brick & Tile Computing Slide Rule, Scan provided by David Rance, The Netherlands
2012.12.07 - Dietzgen - Added Dietzgen 1737 "Sigma" Instructions to specimen.
2012.12.03 - Ricoh - Added (Replaced) Sans & Strieffe No. 311 (S435) dcP.S-2 log log slide rule. Added logo to Sans & Streieffe section of gallery.
2012.12.03 - Acumath - Added Fullerton-Acu Model 1240 Pocket slide rule, with bio, Donated by Pamela Lanier Wolfe Browne, Kernersville, North Carolina.
2012.12.03 - Dietzgen - Added Eugene Dietzgen D&P Improved Slide Rule, with bio, Donated by Pamela Lanier Wolfe Browne, Kernersville, North Carolina.
2012.12.03 - MiscEuro/DIWA - Added DIWA 851/4 pocket duplex. Donated by Ron Dies Architecture, Vancouver, BC, Canada.
2012.12.03 - Hemmi/Hughes-Owens - Added Hughes-Owens 1771 dcJB (Feb 1959). Donated by Ron Dies Architecture, Vancouver, BC, Canada.
2012.12.02 - Nestler - Added(Replaced) c1920 Mannheim (S403) 12.10.01.01
2012.12.02 - KE_Standard - Added K&E 4090-3 sn502283 [rare]
2012.12.02 - MiscJapan - Added Royal Executive No. 5091 donated by Ville Koskinen of the UK.
2012.12.02 - Pickett - Added additional scans of PR-13 and PR Trig rules showing transparency, corrected description. Provided by Cassou Olivier, France
2012.12.01 - Display - Installed an exhibit in the broomfield Public Library, consisting of slide rules, abac1 and electronic slide rule calculators. Runs through Jan 31, 2013.
2012.11.22 - Received donated slide rules from the collection of Robert L. Allison of Ballard, Washington.
  • 12.11.22.01 Pickett Model N3-ES Power Log Exponential Log Log, with leather sleeve.
  • 12.11.22.02 Acu-Math No. 400 Mannheim with sleeve.
  • 12.11.22.04 Sun Hemmi's Bamboo Slide Rule Model 47 c1930, with sleeve. Has Quot. and Prod. symbols with decimal aids.
  • 12.11.22.03 Pickett Model 1010 copyright1948, artwork 271 & 74
  • 12.11.22.05 K&E Gold Tie Clasp
  • 12.11.22.06 Nestler Nr.0115 Techniker, pocket slide rule
  • 12.11.22.07 Concise No. 320 Circular Slide Rule
  • 12.11.22.08 Calculator Specialties Co. Slide Chart. Heating Calculator
  • 12.11.22.09 Derck's Guage Dial Co. SIMPLE-FYER DIAL, Trigonometry Simplified, Disk chart. Copyright 1943 James Derck
2012.11.20 - Received donated slide rules from Ron Dies, an architect in Vancouver, BC, Canada.
  • 12.11.20.01 Hughes-Owens (Sun Hemmi) 1771 dcJB
  • 12.11.20.02 DIWA Darmstadt No. 851/4
2012.10.22 - Received donated slide rules from Pamela Lanier Wolfe Browne, Kernersville, North Carolina. Note: Pamela is the widow of Harry Edson Browne (1933-2006). Harry Browne was an inspirational speaker who wrote 19 books that sold more than 2 million copies. In 1996 and 2000 he was the nominee of the Libertarian Party for President of the United States.
  • 12.10.22.01 Eugene Dietzgen D&P Improved Slide Rule, Patent June 28, 1898, railroad track style divisions. Owned by PLW Browne's Godmother's Husband: Major Paul C. Allred, Jr., with photo and bio.
  • 12.10.22.02 Fullerton-Acu Model 1240 Pocket slide rule, owned and used by Pamela L.W. Browne, with photo and bio.
2012.10.07.01 - Acquired K&E 4090-3 sn502283, made possible through slide rule and financial donations
2012.10.01.01 - Acquired Albert Nestler c1920 slide rule made possible through slide rule and financial donations
2012.09.26 - MiscUSA - Added four C-Thru slide rules, Version 1 and 2 (both with cursors), proportional and Concrete calculator, donated by Huang Collection
2012.09.25.02 - Acquired Sans & Streiffe (Ricoh) No.311, made possible through slide rule and financial donations
2012.09.25.01 - Received donated Royal Executive No. 5091 from Ville Koskinen of the UK.
2012.09.24 - Dietzgen - Added pocket slide rule (dated c1915). Scan by Cassou Olivier, France.
2012.09.24 - Ricoh - Added Eco-Bra 1460 pocket slide rule. Scan by Cassou Olivier, France.
2012.09.24 - Ricoh - Added Compass 403 pocket slide rule. Scan by Cassou Olivier, France.
2012.09.24 - Pickett - Added Log-Log slide rule, based on the PR-12 projection rule. Scan by Cassou Olivier, France.
2012.09.16 - Faber - Added (Replaced) Verlag Chemie Pocket Slide Rule ISRM 12.09.15.01 (SRC357871)
2012.09.16 - Pickett - Added (Replaced) Microline 121C-T (S147) with Retail card version donated by Oughtred Society
2012.09.16 - SR_WhosWho - Added André Charvoz, founder of Charvoz and partner Abel Gottheimer founder of Roos
2012.09.16 - Dietzgen - Corrected maker of 1774-M from Reiss to Ecobra, as instructed by French collector Olivier
2012.09.15 - Calculators - Added Melcor SC-635 and SC-645 (note ISRM had to re-invent the battery module and hard wire into the calculators)
2012.09.12 - Received donation from Blane Rhoten of Maryland, now a Friend of the Museum
2012.09.05 - Received donation from Raymond Lejuez of New Jersey, now a Friend of the Museum
2012.09.04 - Calculators - Added some support text and pictures on slide rules vs calculator longivity, and rearranged html for appearance.
2012.09.03 - Calculators - Added Compucorp 322G Scientist (1971) and TI Programmer (1977) donated by Huang Collection.
2012.09.03 - Lawrence - Added (Replaced) 8-B (S028) with one from Mike Konshak's personal collection that he used at 14, included an article and picture on rocketry and slide rules
2012.09.02 - Soviet, SR_Menu, SIC - Corrected broken links found by John Oakhill in Australia. Thanks for the Help!
2012.09.01 - Pickett - Added Model 3 Deci Multiphase Log Log slide rule (2nd Version). Belonged to H. McFadden. Donated by Laurie Deiter. Minor reformatting at end of page.
2012.09.01 - MiscUSA - Added Walter J. Kudlaty catagory and his Press Tonnage Calculator slide rule. Belonged to H. McFadden. Donated by Laurie Deiter
2012.09.01 - SR_WhosWho - Added Walter J. Kudlaty, designer of the Press Tonnage Calculator slide rule
2012.09.01 - Received donation of slide rules and electronic calculators from Tom and Laurie Deiter, Louisville, CO
  • 12.09.01.01 Pickett Model 3 Deci-Multiphase Log Log (c) 1947 Belonged to H. McFadden (father of Laurie Deiter)
  • 12.09.01.02 Walter J. Kudlaty Press Tonnage Calculator, (c)1949
  • 12.09.01.03 Texas Instruments TI-35 Plus Calculator dcRCI-5187(works w/ new bat)
  • 12.09.01.04 Sharp EL-506S Scientific Calculator sn16155578 (1978)(works w/ new bat - missing screws)
2012.08.31 - Received donation from John Oakhill of Australia, now a Friend of the Museum
2012.08.29.01 - K&E_Standard - Added(Replaced) 4080-3 sn838161 (4080-3 sn824568) belonging to Reed W. Campbell. Included US Naval Academy logo and 1945 class pin.
2012.08.25.01 - Received donation of K&E 4080-3 sn838161 1942 Issued to Reed W. Campbell at the US Naval Academy. Donated by daughter Barbara Campbell of Livermore, CA
2012.08.27 - Received additional lot of donations of electronic calculators belonging to the Huang Collection. TI calculators and PC100A printers, Compucorp 322G Scientist.
  • 12.08.27.01 Compucorp 322G Scientific
  • TI PC100A (3) ...
  • 12.08.27.07
2012.08.24 - SRM_Home - Removed Scientific American article and Berkely Breathed cartoon links as these appear in the Ephemera page.
2012.08.24 - Calculators - Added OMRON 8SR sales sheet as jpg and pdf.
2012.08.23 - SR_Library_Catalogs - Added Sun Hemmi 1926 'Calculating Rule' Catalog
2012.08.23 - Hemmi - Added Sun Hemmi 1926 'Calculating Rule' Catalog at bottom of page
2012.08.22 - Abaci - Added Sharp Sorokaru (Soroban+Calculator_ Models EL-428 and EL-8048
2012.08.22 - Calculators - Added Sharp Sorokaru (Soroban+Calculator_ Models EL-428 and EL-8048 in post 1980 section
2012.08.21 - Calculators - Added HP-21, HP-25, HP-25C, HP-29C, HP-31E,HP-32E,HP-33C,HP-34C,HP-37E,HP-38C,HP-41C,HP-41CV. Donated by Huang Collection. Added Exhibit placards and manuals where applicable.
2012.08.21 - Received donation from David O'Brien of Arizona, now a Friend of the Museum
2012.08.21 - Calculators - Added HP-55, HP-80, TI-30-II, TI Bus Analyst II, HP-67, donated by Huang Collection. Added Exhibit placards and manuals
2012.08.20 - SR_Library_Books - Added Scan of "The Slide Rule - Tutortext By Robert Saffolf and Ann Smalley - 1962" Ref M199. Scanned by Kent Berglund, PhD.Cary, IL. Corrected broken link on 3 thumbnails.
2012.08.17 - SR_Ephemera - Corrected Joshua Routledge (1773-1829) birthdate. Added picture of HP-45 with K&E slide rule from HP-45 Handbook, Page 6.
2012.08.17 - SR_WhosWho - Added Joshua Routledge (1773-1829) inventor of the Routledge Slide Rule 1805
2012.08.16 - Received donation of TI calculators belonging to the Huang Collection. These will replace many TI models in the Calculator gallery
  • 12.08.16.01
  • ...
  • 12.08.16.37
2012.08.15 - Received donation of HP calculators belonging to the Huang Collection These will replace many HP models in the Calculator gallery
  • 12.08.15.01
  • ...
  • HP-35, HP-80, HP-45, HP-55, HP-67
  • HP-21, HP-25, HP-25C, (most INOP)
  • HP-31E, HP32E, HP-33E, HP34C, HP-37E, HP-38E. HP-41C (most INOP)
  • LCD Calculator Models - HP-11C, HP-15C
  • HP-71B and HP-75C Portable Computers
  • ...
  • 12.08.15.45
2012.08.15 - SR_Home - Added banner and link to pictures of exhibit at Louisville, CO public Library. Announced next exhibit at the Broomfield Public Library.
2012.08.15 - SR_Displays - Added pictures of exhibit at Louisville, CO public Library. 2012.08.14 - Ephemera - Added pictures of Janis Lyn Joplin, famous rock singer, when she was a member of a slide rule club in 1959, Thomas Jefferson HS, Port Aurthur, TX.
2012.08.14 - Received donation of 7 Abaci belonging to the Huang Collection
2012.08.09 - - Received donation of 3 'Slide Rule' Calculators from Scott Reynolds, Hemut, CA. Vintage Calculators Inc.
  • 12.08.09.03 Nestler T52
  • 12.08.09.02 Omron 8SR
  • 12.08.09.01 Omron 88SR
2012.08.06 - Received donation from Justin Moretti of Canada, now a Friend of the Museum
2012.08.06 - Aerospace - Added Cox & Stevens B-24 Load Adjuster Slide Rule. Donated by Lyle Wells of Henderson, Nevada
2012.08.06 - Pickett - Added N4-ES (1958-1959) Vector Type Log Log and 1010-T (1957) Trig with Cast Metal Braces. Donated by Lyle Wells of Henderson, Nevada
2012.08.05 - Received Donation of Slide Rules and book from Lyle Wells, Henderson, NV. c/o Donna Silva, with bio and personal photo.
  • 12.08.05.01 - Cox & Stevens B-24 Load adjuster Slide Rule, for Tail Number 49085
  • 12.08.05.02 - Pickett N4-ES (1958-1962) Vector Log Log Slide Rule
  • 12.08.05.03 - Pickett 1010-T (1957) Trig Slide Rule with die cast braces and cursor blocks
  • 12.08.05.04 - Book, Slide Rule Simplified, by C.O. Harris, American Technical Society
2012.08.01 - Display - Installed Exhibit at the Louisville Public Library. Theme: Electronic Slide Rule Calculators and the demise of the Slide Rule and Abaci Industry. 2012.07.18.01 - Sterling - added 651 Metric Convertor donated by Russ Anthony in memory of his Father Ward B. Anthony
2012.07.18 - SR_Ephemera - added addometer adding machine Ad from modernmechanix, Dec1947
2012.07.16.01 - British - Added Fisher Controls Valve Sizing Slide Rule to Blundell Harling catagory, ref BHL FC3540
2012.07.15 - Abaci/Ephemera - Created new gallery - added 85 pictures of people using Abaci, Soroban and Schoty , vintage and modern past.
2012.07.05 - SR_Loaner - Added pictures from Collège André-Grasset in Montreal, Canada. Professor Paul Guertin's students using slide rules provided by ISRM
2012.07.02 - Sterling - Added(Replaced) 594 Decimal Trig Log Log (ISRM), Donated By the Huang Collection
2012.07.02 - MiscJapan - Added Japanese_Mannheim_CJEdwards, Japanese_Mannheim_wRulers_ITT_Defense, Donated By the Huang Collection
2012.07.02 - MiscEuro - Added Diwa 601-1 dc294 Components Inc, Diwa 601-1 dc012 Grundfoss Pumps,Donated By the Huang Collection
2012.07.02 - Faber - Added(Replaced) 2/82 Duplex Falt Plate ends (S205), 62/82 Pocket (P030) ,Donated By the Huang Collection
2012.07.02 - Pickett - Added(Replaced) N600-T, LogLog, 140-T Microline LogLog Version2, 140-ES Microline LogLog Version2, Model 61-C Concrete Calculator, Model 62 Promotional, Model N1010-T RndBlkLogo, N200-ES in Box (P148), N200-ES York in Box,Donated By the Huang Collection
2012.07.02 - Hemmi - Ubdated background on Byoutou Slide rule from first hand experience of Dr. Di Chen
2012.06.30 - K&E Standard - Added 4098 sn27319 Pocket, K&E 68-1100 Decilon sn221850, Donated By the Huang Collection, with bio pic
2012.06.30 - Nestler - Added(Replaced) 0292 MultiMath Duplex dc170 (S207), Donated By the Huang Collection, with bio pic
2012.06.30 - MiscEuro - Added Technostyl 41/R Italy, Donated By the Huang Collection, with bio pic
2012.06.30 - Acu-Math Added Fullerton-Acu 600 Trig, Fulerton-Acu 400 Mannheim, Donated By the Huang Collection, with bio pic
2012.06.29 - Hemmi - Added(Replaced) Hemmi 153 Electrical Engineer, Sep 1961 (S230) Donated By the Huang Collection, with bio pic
2012.06.29 - Post - Added(Replaced) 1460 Versalog sn826144 Black COS (S078),1460_Versalog_dcRF_sn817456 Green COS (S079), Versalog II (w/A scale) noSN, dcTE (S080), Donated By the Huang Collection
2012.06.29 - Pickett - Added(Replaced)Pickett 500 Ortho-Phase snE911050 from Peter Chmielowiec of Louisville, Colorado, with photo and bio.
2012.06.29 - Received donation of magnesium Pickett 500 Ortho-Phase snE911050 from Peter Chmielowiec of Louisville, Colorado
2012.06.28 - Dietzgen - Added(Replaced) 1738 Multilog Multiplex Style M and 1744 Polymath sn300543(S286 and S341) , Donated By the Huang Collection
2012.06.28 - Dietzgen - Added(Replaced) 1734 Microglide sn056181 (S277) Donated By the Huang Collection, with bio pic
2012.06.28 - SRLoaner/NorthwoodHS.htm - Added pictures from 2012 Northwood High School, Silver Springs. Maryland, Leor Baldinger's class.
2012.06.28 - Aristo - Added(Replaced) 0968 Studio (S100 V2) dc64-115, Version 2 and 0903-T Scholar Charvoz; Donated By the Huang Collection, with bio pic
2012.06.28 - MiscUSA - Added 3 Foxboro Valve Sizing Slide rules; Donated by Carlee Heit, the Ray Heit Collection and NatGasEdu.com
2012.06.28 - Circular - Added Concise 320 with Calendar (1968-1981), Donated By the Huang Collection, with bio pic
2012.06.27 - MiscUSA - Added(Replaced) Guedon, Camden, New Jersey, metal vest pocket slide rule 1943 (P118), donated by Scott Reynolds, Vintage Calculator inc.
2012.06.26 - Pickett - Added(Replaced) N-531-ES CREI Donated By the Huang Collection (Replaced item from Andy Keller Donation)
2012.06.25 - MiscJapan - Added(Replaced) Bristol Line No. 19-5 (P047), Donated By the Huang Collection, with bio pic
2012.06.25 - British - Removed Misc British catagory, moved Bristol Line slide rule to MiscJapan. Changed SR_Menu link.
2012.06.25 - Slide Rule Loaner - Received pictures of Northwood High School students in Silver Spring, MD using ISRM supplied slide rules
2012.06.25 - MiscEuro - Added(Replaced) Diwa No.720 Polylog (S336), Donated By the Huang Collection, with bio pic
2012.06.25 - Nestler - Added Albert Nestler A-G Mannheim c1920, english equivalents [etsy $20]
2012.06.24 - Hemmi/Odelco - Added Hemmi 259-D Mechanical Engineer Donated By the Huang Collection, with bio pic
2012.06.24 - Ricoh - Added(Replaced) Lutz 252 U.S. Government (S094) Donated By the Huang Collection, with bio pic
2012.06.24 - Pickett - Added(Replaced) Microline 140 Red LogLog (S330), N600-ES LogLog Pocket, No.120 (S133), N1010-ES Trig (S178); Donated By the Huang Collection
2012.06.24 - Received approx 60 slide rules belonging to the Huang Collection
2012.06.23 - Received 2 Hemmi slide rules, Electro with Decimal Keeper and 257 Chemical Engineer, belonging to Jiro Higuchi and his father. Kamakura, Japan.
2012.06.23 - Calculator - Added HP9100A (2012.06.23.01), HP-27 (2012.06.23.02) and Radio Shack EC-420 (2012.06.23.03)slide rule calculators.
2012.06.23 - Post - Added(replaced) Pocket Dual 10"/5" slide rule (P088) [etsy] .
2012.06.22 - Received donation from G. Larry Kehl now Friends of the Museum
2012.06.20 - Calculator - Added scanned manual for 1974 Commodore SR-36 Electronic Slide Rule Calculator.
2012.06.20 - Abuci - Added historical pictures and 2nd specimen to gallery, with historical trivia
2012.06.19 - British - Added Wollaston Chemical Slide Rule
2012.06.18 - Pickett - Added Model 1000 magnesium sn02B4935
2012.06.18.02/01 - MiscUSA - Added Henschel No. 1096 Made by Nestler; and Gerber Variable Scale Model TP007100B.
2012.06.18.03 - Hemmi - Added 153 Occupied Japan, owned by Rear Admiral Forrest A. Rhoads (1898-1965), Donated by Rod Vance, Australia
2012.06.18.04 - Dietzgen - Added(replaced) Phillips 1740 (S115), owned by Radm Forrest A. Rhoads (1898-1965)
2012.06.17 - Terms - Added PI to many decimal places. Did you know all slide rules, calculators or abaci images at ISRM are set at PI?
2012.06.17 - Abuci - Added historical pictures and first specimem, donated by Joel Haertling of Boulder, Colorado
2012.06.17 - SR_Ephemera - Added two new pictures, United Airline Mechanics and a modern Cartoon
2012.06.16 - Received donation of a Hemmi 153 from Rod Vance, Australia. This belonged to Rear Admiral Forrest A. Rhoads
2012.06.12 - Received donation from Riki Nakamoto of Hawaii, now Friends of the Museum
2012.06.11 - Media - Mike Konshak, the ISRM curator was quoted for an article in the San Francisco Chronicle, "New Education Standards End Rote Learning"
2012.06.10 - Received donation to cover purchase of slide rule owned by rear admiral Rhoads, by Rod Vance, of Australa.
2012.06.09 - Abuci - Created new gallery for Abacus, Suan Pan, Shoty, and Sorobans
2012.06.08 - Received donation of an HP 9100A sn816-0047 desk top 'slide rule' calculator. By Alexey Davies of Boulder, Colorado. Was a Bell Telephone Labs (BLT) asset.
2012.06.08 - Aerospace - Added A4D Skyhawk Computer, owned by Astronaut Paul Weitz
2012.06.07 - Received donation from Dr. Paul Tarantolo of Texas and Mark Johnson, now Friends of the Museum
2012.06.03 - Dietzgen - Added 1745 USMC Issue - Magnifying/Frameless Cursor. Purchased at a Denver Antique Store in 2011
2012.06.02 - Aristo and MiscEuro/Klawun- Added 0908 TriLog, Klawun Feinmessinstitut Slide Rule donated by Ted Hume, Texas (in 2009)
2012.06.02 - Pickett - Added Collins Radio C-19-T Microwave Transmission Slide Rule donated by James Price, Tacoma, Washington, included short biography
2012.06.02 - Received donation of Thacher Cylindrical Slide Rule. from Dick Rose, Ohio
2012.06.02 - Received donation of Pickett C-19 Collins Radio Slide Rule with 4 inserts. from James Price, Washington
2012.06.01 - Received donation from ISRG members: David Rance of the Netherlands, John Stevenson of Canada, Robert Witt of New York, Andrew Currie of New Zealand , now Friends of the Museum
2012.05.31 - Received donation from ISRG members: Cyril Catt of Australia, Angel Carrasco Conejo of Spain, Gregory McClure of Colorado, Roi Gift of Washington, Rod Vance of Australia, Thomas Yorker of New York. now Friends of the Museum
2012.05.31 - Display - The 'Slide Rule' Calculator exhibit was dismantled in the Boulder Public Library and put up for the next exhibit.
2012.05.31 - Ephemera - Add slide rule watch ad, Modern Mechanix 1959, Cartoon by Scott Hilburn, and 3 photos of the Missouri Univ. Mascot Joe Miner
2012.05.31 - Library/Pickett - Added Pickett Insert Part No 25-416, Basic Slide Rule Instructions
2012.05.31 - Library/British - Added Helix Regal Series Instructions. Added Unique_Half-Hour_Instructions Donated by Richard Davis
2012.05.30 - Library/Pickett - Added Pickett 101-C Dial-Rule instructions (1957). Donated by Ann Kilby, Kingston, Washington
2012.05.30 - Received donation from ISRG members: Jack Segal, David Ogden, Bennie Tschoerner of Texas, Alvaro Gonzalez, Frank Robertson, John Ireton, Richard Rose of Ohio. Sean Sanderson of Vermont, Anthony Nevett of New Zealand, Michael Mjelde, Ian Lodge of UK, Hans Milton of Sweden, Jose Gabriel Fernandez of Spain, William Hill of Texas, Peter Fox of UK, Jeremy McCarthy of UK now Friends of the Museum
2012.05.29 - Library/Misc_Euro - Added Aristo Models 868 and 968 Studio, 01068 Instructions (3rd Version). Contributed by Amin Aur, Norman, Oklahoma
2012.05.29 - Received donation from Amin Aur of Oklahoma, and Miles Schumacher, Windsor Heights of Iowa, now Friends of the Museum
2012.05.27 - SRM_Home and Fund Raiser - Added souvenier shop for t-shirts/mugs, etc with ISRM logo.
2012.05.26 - SR_Terms/Encyclopedia - Added Slide Rule Tuning definition
2012.05.26 - Demonstration Slide rules - Added pictures of "Dr. Dalai"'s demo slide rule collection hanging in his office.The best I've seen.
2012.05.26 - Received donation from Michael Andersson of Sweden now Friends of the Museum
2012.05.25 - Received donation from James Price of Washington now Friends of the Museum
. 2012.05.24 - Received donation from Michael P. Hass of Virginia now Friends of the Museum
2012.05.22 - Received donation from Kent Berglund, Giuseppe Bianchi of Italy. now Friends of the Museum
2012.05.21 - Received donation from Giovanni Mai of Italy, Paul Anderson, Miniature Memento, Stephen Treadwell, and Marion Moon of california; now Friends of the Museum
2012.05.23 - Received donation from Ingo Elsen of Germany, now a Friend of the Museum
2012.05.15 - Library - disabled files access, but left thumbnails, to see if anyone would notice and donate $. I might disable the SR files as well. Lets see what happens. We need 200 Friends to donate $10 each to cover the immediate needs.
2012.05.14 - Paypal - Added donation button to all galleries and donation request to home and friends, library pages,
2012.05.14 - WhosWho - Added photo of John Pickett, son of founder Ross Pickett of P&E
2012.05.13 - Friends of ISRM - begun to build the Friends list from the galleries and other records
2012.05.13 - Received donation from Carl Wyant, now a Friend of the Museum
2012.05.13 - Calculators - Too much to tell, updated the page with the latest acquisitions and research on slide rule calculators.
2012.05.13 - Pickett - Corrects scale set on N4-T. Fixed radical symbol on IE9 using face="Arial" in font.
2012.05.12 - Media - Did a taped radio interview (Jeff Emtman) on the exhibit at the Boulder Public Library and the history of slide rules
2012.05.08 - Library/British - Added Technical Sales Emblem Series 1071 Commercial Instructions. All donated by Richard Davis., Las Vegas, Nevada
2012.05.08 - MiscEuro - Added TEKNOR No.181 Gymnasium and DIWA 611 Electro Pocket. All donated by Richard Davis., Las Vegas, Nevada
2012.05.08 - British - Added(Replaced) Technical Sales Emblem Series 1051, 1053, 1071, 1081, 1091. All donated by Richard Davis., Las Vegas, Nevada
2012.05.07 - SR_Menu added Hellerman and Helix brands to list
2012.05.07 - Library/British - Added Helix Regal Series Instructions. Modified scan originally from Tina Cordon
2012.05.02 - British - Misc British Added Hellerman No. 51, and Helix Regal A102S. Both new catagories. Acquired out of England with Electronic Calculators
2012.05.02 - British - Added Thornton AD060 (Archive ref) and Unique Mannhiem (OEM Lietz 2975). Donated by Richard Davis., Las Vegas, Nevada
2012.05.02 - MiscEuro - Added Logarex 27203 Darmstadt Pocket and 27601-I Studio. Donated by Richard Davis, Las Vegas, NV.
2012.05.02 - MiscUSA - Added Lietz 2971-P USA (made by Bruning) and Lietz 2975 (made by Unique). Donated by Richard Davis, Las Vegas, NV.
2012.05.02 - MiscJapan - Added ALCO 587 Pocket slide rule in retail ($1.00) Package. Belonged to Ruth Moira Kane, Donated in her memory by daughter Ann Kilby, Kingston, Washington
2012.05.02 - Lawrence - Repaired broken image links
2012.05.06 - Post - Added(Replaced) 2 models of 1446-D Student (S502) Owned by Wallace E. Kane Donated by step-daughter Ann Kilby, Kingston, Washington
2012.05.06 - K&E - Added 4081-5 20inch Duplex Log Log Decitrig Owned by Wallace E. Kane, and N4058W Beginner's SR Donated by step-daughter Ann Kilby, Kingston, Washington
2012.05.06 - Ricoh - Added(Replaced) Lutz 252 U.S. Belonged to Ruth Moira Kane, Donated in her memory by daughter Ann Kilby, Kingston, Washington
2012.05.06 - Circular - Added(Replaced) Circular Dial Rule 101-C (C15). Donated by Ann Kilby, Kingston, Washington
2012.05.06 - Pickett - Added(Replaced) Circular Dial Rule 101-C (C15). Donated by Ann Kilby, Kingston, Washington
2012.05.06 - Dietzgen - Added(Replaced) 1757 Primatrig (S112) slide rule. Donated by Scott Reynolds (Vintage Calculators inc.), Helmut, California.
2012.05.06 - British - Added(Replaced) Jakar 523A LL Pocket (P237), Jakar 22 Pocket and Jakar 33 Duplex. Donated by Richard Davis., Las Vegas, Nevada
2012.05.06 - Library/British - Added Jakar Instructions for models 11,22,29,33,55,66,77,88,99; and Technical Sales Emblem Series Instructions. Donated by Richard Davis., Las Vegas, Nevada
2012.05.04 - Received donation of K&E K12-Prep and Dietzgen 1757 Primatrig slide rules. Donated by Scott Reynolds (Vintage Calculators inc.), Helmut, California.
2012.05.03 - MiscEuro - Added/(Replaced) Logarex 27403-X Darmstadt (S569) donated by Richard Davis, Las Vegas, Nevada
2012.05.02 - Received Donation of 8 slide rules and manuals from Ann Kilby (hers and her parents Wallace and Ruth Kane), Kingston, Washington. A family of scientists.
  • .01 Lutz NO. 252, dc MS-4 U.S., belonged to Ann's Mother: Ruth Moira Kane (1921-2007). Used in graduate school, Career in Theoretical Physics
  • .05 ALCO Basic Mannheim, belonged to Ann's Mother: Ruth Moira Kane (1921-2007). Used in graduate school, Career in Theoretical Physics
  • .02 K&E 4081-5 sn630198 with green leather case and manual, belonging to Ann's Step-Father: Wallace E. Kane. Used in graduate school and career in Theoretical Physics
  • .03 K&E 4058W with red Post case, belonging to Ann Kilby. Used in high school and early college (biology). career in Healing arts
  • .04 Pickett 101-C with case and manual, belonging to Ann Kilby. Used in high school and early college (biology). career in Healing arts
  • .06,.07 2 Post 1446-D Student, belonging to Ann's Step-Father: Wallace E. Kane. Used in under-grad school. Career in Theoretical Physics
  • Manual - K&E No. 4081
  • Manual - K&E No. 68-2047, old 4187S
  • Manual - K&E Horse Sense
  • Manual - Lawrence
  • Manual - Pedigree
  • Manual - Pickett 101-C
2012.05.01 - Display - The 'Slide Rule'Calculator exhibit was installed in the Boulder Public Library.
2012.04.29.01 - Electronika MK33 Calculator, Donated by Scott Reynolds..others to list
2012.04.28 - MiscEuro - Added note on Fedra LogLog about Skip Zogopoulos, Exeter, NH being a donor of these to the ISRM slide rule loaner program.
2012.04.27 - Faber - Added(Replaced) 2/82N Novo Duplex (S122) donated by Rod Vance, Victoria, Australia
2012.04.25 - MiscUSA - Added Honeywell Metric Converter, donated by Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
2012.04.25 - MiscEuro - Added Logarex 27602, donated by Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
2012.04.25 - Circular - added Concise/Sama & Etana CTCS-552 with American Oil logo, donated by Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
2012.04.25 - Received donation of slide rules fom Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
  • .03 Honeywell Metric Converter, donated by Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
  • .01 Logarex 27602, donated by Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
  • .02 Concise/Sama & Etana CTCS-552 with American Oil logo, donated by Zdenka Novosad, retired Petroleum Engineer, Louisville, Colorado
2012.04.23.01 - K&E - Added(Replaced) 4080-3 (S015) Log Log Duplex Trig sn422987 c1947, purchased from shopgoodwill.com
2012.04.23.02 - Hemmi Added 153 for Elec. Eng. donated by Jim Jeffery, Deleted 153 (S324) for Elec. Eng. and 251 (S034) for Mech. Eng. as these were duplicates.
2012.04.22 - ISRC - Added 2012 RST championship with picture of winners. Kraemer, Rudowski and Luetjens
2012.04.19 - SR_Links - Added Marksmath.com (Mark Armbrust Collection, Boulder, Colorado)
2012.04.07 - Ephemera - Added 1966 photo of Yokagawa-Hewlett-Packard 4260a Design Team and 5 ads for Popular Science 1942-1971
2012.04.06 - Calculators - TOO MANY CHANGES TO LIST! - Getting ready for an exhibit at the Boulder Public Library in May
2012.03.23 - Ephemera - Added 1966 photo of West Point graduate John T. Reed using a slide rule as a cadet
2012.03.23 - SR_Terms/Encyclopedia - Updated USAF Academy entry with chronology of math instruments used by different classes ('59-'90) and to the USN Academy
2012.03.22 - Library/MiscEuro - Added 989 Complex Slide Rule, 989 Komplex-Rechenplatte Instructions in German and in English, donated by Henry Benoit, Kingston, Ontario, Canada
2012.03.21 - Lawrence - Added 10-B and Eng. Inst. 10-B, donated by Henry Benoit, Kingston, Ontario, Canada
2012.03.21 - Aristo - Added 0970 and 870 multilog, donated by Henry Benoit, Kingston, Ontario, Canada
2012.03.21 - Faber - Added 989 Complex Slide Rule, 989 Komplex-Rechenplatte, donated by Henry Benoit, Kingston, Ontario, Canada ISRM 12.03.21.01
2012.03.21 - Received donation of five slide rules from Henry Benoit, Kingston, Ontario, Canada used in his career (with personal photo and bio).
2012.03.17 - Adders/Troncets - Added a series of factory photos of a visit to the Addiator factory in Berlin (bottom of page)
2012.03.16 - Adders/Troncets - Added a Magic Brain and Midget adding machines
2012.03.16.02 - K&E - Added(Replaced) N4053-5 20 inch Mannhiem sn830192 (L01) 1933-1935
2012.03.16.01 - K&E - Added 4080-5 20 inch Log Log Duplex Trig sn632018
2012.03.16 - SR_Library_MiscUSA - Added Charles Bruning 68-540 (old 2401) istructions
2012.03.16 - MiscUSA - Added Charles Bruning 68-540 (old 2401) in retail box, w/ link to instructions
2012.03.13 - MiscWorld - Added Tianjin 6504 Special scale Instructions By Liu Qinglin (Beijing, China) to Tinajin 6504 specimen, Contributed by Steve Treadwell
2012.03.13 - SR_Library_Soviet (China) - Added Tianjin Squirell 6504 Special scale Instructions, Contributed by Steve Treadwell
2012.03.15 - Hemmi - Added Electro, pre 1927 early model with train track scales, a Japanese copy of AW Faber 387
2012.03.15 - Post - Added (Replaced) 1445P 8in (S497)
2012.03.13 - SR_Library_Japan - Added SIC (Scientific Instruments) model 1570 and 1580 Instructions. scans by Jodie Hobson.
2012.03.13 - Pickett - Added Model 100 and Model 6 Instructions to relevant slide rules in gallery, scan donations by Steve Treadwell.
2012.03.13 - SR_Library_Pickett - Added Model 100 Douglas Sky rule and Model 6 Quality Control and Statistal Instructions, scan donation Steve Treadwell.
2012.03.08 - SRM_Home - Placed promotional paragraph about the new Slide Rule Calculator Gallery.
2012.03.02 - Received Donations of 18 Slide Rules from Richard Davis, Las Vegas and 20 Picketts to support the slide
rule loaner program from members of the Oughtred Society that attended the West Coast Meeting in LA, Febuary, 2012.
  • 12.03.02.02 - QTY 14 Pickett 140C-T in Retail hanging Card
  • 12.03.02.01 - QTY 6 Pickett 121C-T in Retail hanging Card
  • .02 Unique USRC, Lietz 2975, Donated (ref 102) by Richard Davis, Las Vegas
  • .01 British Thornton AD060 Standard, Donated (ref 113) by Richard Davis, Las Vegas
  • .06 Emblem Series Tutor No.1051, NIB, Donated (ref 121) by Richard Davis, Las Vegas
  • .07 Emblem Series Olympic LL No.1053, NIB, Donated (ref 122) by Richard Davis, Las Vegas
  • .09 Emblem Series Commercial No.1071, NIB, Donated (ref 123) by Richard Davis, Las Vegas
  • .08 Emblem Series Techlog No.1081, NIB, Donated (ref 124) by Richard Davis, Las Vegas
  • .10 Emblem Series Executive No.1091, NIB, Donated (ref 124) by Richard Davis, Las Vegas
  • .04 Logarex Teknor Gymnasium No.1081, NIB, w/case Donated (ref 104) by Richard Davis, Las Vegas
  • .03 Logarex Teknor Gymnasium No.1081, Used, Donated (ref 106) by Richard Davis, Las Vegas
  • .15 Logarex Darmstadt 27203 Pocket, Donated (ref 103) by Richard Davis, Las Vegas
  • .05 Logarex Darmstadt 27403-X, Donated (ref ?) by Richard Davis, Las Vegas
  • .11 Logarex Studio 27607-1, Donated (ref 107) by Richard Davis, Las Vegas
  • .12 Jakar No.523A, Pocket, Donated (ref 108) by Richard Davis, Las Vegas
  • .14 Jakar No.22 Darmstadt, Pocket, Donated (ref 109) by Richard Davis, Las Vegas
  • .13 Jakar No.33 Duplex Log/Log, Pocket, Donated (ref 110) by Richard Davis, Las Vegas
  • .16 Diwa No.611 Electro, Pocket, Donated (ref 112) by Richard Davis, Las Vegas
  • .17 The A. Lietz CO. 2971P, Pocket, Donated (ref 101) by Richard Davis, Las Vegas
  • Jakar Instructions for No. 11,22,29,33,55,66,77,88,99, Donated (ref 111) by Richard Davis, Las Vegas
2012.03.02 - Received Donation of "The Slide Rule" by Robert Saffold and Ann Smalley (TutorText) from John Roe, Uxbridge, MA
2012.03.02 - SRM_Intro - Updated logo, added collage of math instruments (slide rules and calculatorsthe curator used in his career.
2012.03.02 - Faber - Added FC TR-1, TR-2 and TR-3 Electronic Slide Rule/Calculators Hybrid
2012.03.02 - Calculators - Added a new gallery showing 32 Electronic Slide Rule Calculators (1972-1977)
2012.02.29 - Military - Added 5 155mm Howitzer Cannon Graphical Firing Table Slide Rules - Vietnam Era
2012.02.27 - PocketWatch - Added banner and hyper link to Art Simon's Slide Rule Wristwatch web pages
2012.02.24 - Received donation of 100 new Fedra slide rules for school loaner program and
10 Pickett N500/N300-ES sets to be sold in fund raiser from Skip Zogopoulos, Exeter, NH.
2012.02.24 - MiscWorld - Repaired broken link to Tianjin Squirell 6502
2012.02.23 - Aerospace - Added Gareth Peach's pictures and magazine articles about Tidbinbilla, Australia and Apollo 11
2012.02.19 - Faber-Castell - Added(Replaced) 51/91 (S101) donated by Nancy Day for William M. Day. Included Bio and picture.
2012.02.19 - K&E - Added(Replaced) 68-1617 sn750904 (S201) donated by Nancy Day for William Bruce Day. Included Bio and picture.
2012.02.19 - MiscUSA - Added(Replaced) C-Thru No 27 Pocket Slide Rule (P205) and Stock Yield Slide Rule. donated by Nancy Day for William Bruce Day.
2011.02.19 - SRM_Home - Added pictures on righthand date-line column of African-Americans using slide rules
2011.02.19 - SRM_Home - Rearranged home page to show a compact list of galleries and Libraries
2011.02.15 - SR_WhosWho - Added Edward A. Straker to the gallery.
2012.02.15 - Aerospace - Added Gareth Peach's System Temperature slide rule used in NASA
2012.02.15 - Aerospace - Added new gallery for Aviation and Space related sliderules.
2012.02.15 - Pickett - Added Cleveland Electrical Institute ad from 1965 Popular Sciance mag to slide rule gallery
2012.02.14 - Ephemera - Added 12 pictures. Of special interest are some from Texas A&M,Cushing Memorial Library Archives and Michigan State.
2012.02.14 - SR_Home - Created a Facebook Account for ISRM and provided a 'Like' link.
2012.02.13 - Rarities - Added Stanley #15 Two Fold Joint Carpenter's rule with Gunter's slide. C1890.
2012.02.12 - Military - Changed title to include 'Space-Race' related slide rules.
2012.02.12 - MiscUSA - Added(Replaced) Carles Bruning 2401 (P055) with Westinghouse Electric Promo on reverse.
2012.02.12 - Post - Added(Replaced) 1444-P (P057) with Preferred Utilities Promo on reverse.
2012.02.10 - Ephemera - Added pictures of scenes from the 2008 movie Peggy Sue Got Married showing a slide rule.
2012.01.10 - Nestler - Added No. 40 with name engraved "Martin Vauple Bremen"
2012.01.10 - Dietzgen - Added(Replaced) 1732 (S319) snsn536054 Maniphase Multiplex Decmal Trig LogLog
2012.01.09 - Lawrence - Added section of Lawrence OEM rebranded slide rules found in other ISRM Galleries
2012.01.08 - MiscUSA - Added Lawrence 10-B OEM Charvos-Roos SR-31 and Lietz 2974L. Scan by David Rance, The Netherlnds.
2012.01.07 - Lawrence - Added scans of 30 new models of slide rules made by Lawrence from the David Rance Collection
2012.01.03 - Nestler - Added #35 System Peter. Scan by Hubert added to Hermann's Slide Rule Catalogue
2012.01.03.01 - New Aquisition of Fuller Cylindrical Slide rule out of the UK
2012.01.03 - Rarities - Added J. Rabone & Sons Two Fold Joint Carpenter's rule with Gunter's slide. C1890. Nathan Zeldes Collection
2012.01.03 - SR_WhosWho - Added Henry Coggeshall, c1677. Inventor of the Coggeshall rule and Edwin Thacher (1839-1920) inventor of the Thacher cylindrical slide rule.
2012.01.03 - Ephemera - Added picture of Russian crew on a new AN-72 aircraft using a slide rule.
2012.01.01 - Rarities - Added Two Fold Joint rule with Gunter's slide. C1890. (ISRM Collection).
2011.12.30 - K&E_Standard - Added 4082-3 with F scale. Scan by BajaRon from sliderulecentral.com
2011.12.30 - Manuals - Added M249 Aero Products Research CR-6 Computer Instructions - 32 pages PDF file.
2011.12.30 - SR_Terms/Encyclopedia - Expanded Otis Carter Formby King entry and Added Geniac
2011.12.30 - Circular - Added Aero Products Research CR-6 Computer, Donated by Carlee Heit, Houston, Texas.
2011.12.29 - SR_WhosWho - Added Otis Carter Formby King, with his bio written by ancestor Susan Richards
2011.12.29 - Manuals - Added Otis King's Patent Calculator Instructions - 8 pages PDF file
2011.12.29 - British - Added Otis King Cylindrical Slide rule Early Model K (ebay) and Late Model K and L (HSRC).
2011.12.29 - British - Added/Replaced Otis King Cylindrical Slide rule Model K Scales:423 and 414. snV7554 Leather case
2011.12.29 - Circular - Added Rocket Design Sliderule, Courtesy Of Paul Ceruzzi, National Air And Space Museum
2011.12.26 - Military - Added AN-5837-1 Alititude Correction Computer. Donated by Carlee Heit, Ray Heit Collection.
2011.12.26 - Military - Added Dalton Dead Reckoning Computer E6-B, Donated by James Weber Estate and Time Distance Computer (ebay image)(also in Circular SR gallery).
2011.12.26 - Library/General - Added Dalton Dead Reckoning Computer E6-B, post WWII Instructions. Donated by Carlee Heit, Ray Heit Collection.
2011.12.26 - Circular - Added Dalton Dead Reckoning Computer E6-B, post WWII. Donated by Carlee Heit, Ray Heit Collection and Time Distance Computer (ebay image).
2011.12.23 - Pickett - Added 931-ES (c1959) Capitol Radio Enginneering Institute (square braces) Donated by Dan Marcotte, Rye, New hampshire.
2011.12.23 - Ephemera - Added 9 historical photos/ads/Ephemera of people with slide rules.
2011.12.21 - Donation - Pickett 931-ES Capitol Radio Enginneering Institute (square braces),
K&E 4081 Slide Rule Manual and K&E Elementary Instructions Donated by Dan Marcotte, Rye, New hampshire.
2011.12.18 - Ephemera - Added 25 historical photos of people with slide rules.
2011.12.17 - SR_Menu - Added 'Gerber' manufacturer link to gallery.
2011.12.17 - SR_WhosWho - Added Andreas Tabak, The Collection of Calculating Devices - TCoCD.
2011.12.17 - MiscEuro - Added Klawun Rietz No100, No 100 Hanover, 125LL, and 31c. Picture from Andreas Tabak Collection.
2011.12.17 - MiscEuro - Added Klawun-Meloir Rietz No100 Hanover.Picture from .
2011.12.17 - SR_WhosWho - Added H.Joseph Gerber, inventor of the Variable Scale slide Rule.
2011.12.16 - Emphemera - Added photo of Dr. Robert B. Abernethy using a slide rule (1963).
2011.12.17.01 - Faber - Added 398 Electro with all-glass cursor
2011.12.16 - Pickett - Added 540-T Pratt & Whitney Gas Turbine Slide Rule c1959.
2011.12.16 - Dietzgen - Added Insert Form No. 1700-SRT/500B/PN25 with N1733 Polymath Multiplex slide rule.
2011.12.16 - SR_WhosWho - Added Ovid W. Eshbach and H. Loren Thompson, co-authors of Dietzgen Instruction manuals.
2011.12.15 - K&E_Standard - Added N4053 with Magnifying Cursor. U.S. military model.
2011.12.15 - K&E_Specialty - Added N4096 M 20 inch Merchant's Rule
2011.12.15 - MiscEuro - Added Joe Klawun No1001/S Business Rule. Added 2 company logos to title area.
2011.12.15 - Dietzgen - Added(Replaced) N1733 (S401) Polymath Multiplex Decmal Trig Type Log Log.
2011.12.15 - Post - Added(Replaced) 1446 (S096) pre-WWII Sun Hemmi, Made in Japan.
2011.12.14 - Rarities - Added Ivory Sector, c1825, Same markings as W&S Jones Sector.
2011.12.12 - MiscBritish - Added Unique Study 300 slide rule courtesy of Ted Hume (Texas)
2011.12.12.01 - Rarities - Added Dring & Fage Excise Officers Rule with dual slides, c 1868. Alphabetized webpage by Manufacturer.
2011.12.11 - SR_WhosWho - Added William Hyde Jackson Wollaston - (1766-1828) United Kingdom.
2011.12.11 - Emphemera - Added photo of Harry T. Gisborne using an early fire danger meter in 1937
2011.12.10 - Meetings. Updated International meetings page to be more generic and more maintainable.
2011.12.09 - Donation - Received 10 Unique Study 300 slide rules courtesy of Ted Hume (Texas) for use in support of the slide rule loaner program
2011.12.08 - SR_Terms (Encyclopedia) - Added entry for Joe F. Klawun
2011.12.03 - MiscUSA - Added A. Lietz Co. 2971-N Pocket slide rule made by Hemmi.
2011.12.03 - Emphemera - Added UIL Slide Rule Medal won by Paul Tarantolo, Houston, Texas
2011.12.02 - K&E Standard - Replaced 4092-3 sn256159 (S007) currently stored in Display Frame D3
2011.12.02 - Dietzgen - Added(Replaced) 1732 (Ref Larry Kehl) Type-M Multiphase Decimal Trig Type Log Log
2011.12.02 Aristo - Added(Replaced) 903LL Aristo-Scholar dc3FX80 (A054) logo Stamped On Braces; 901 Aristo-Junior dc1S67 (S203)logo Stamped On Braces
2011.11.23 - K&E Standard - Added(Replaced) N9081-3 (S159) Doric Duplex Decitrig
2011.11.22 - Aristo - Added box images from New In Box (NIB) models 868 and 870 Pocket slide rules
2011.11.22 - MiscWorld - Added(Replaced) Tianjin Squirrel Model 6502 (P238)
2011.11.22 - Post - Added(Replaced) 1447 (S452) SunHemmiJapan dcCB No Post logo, 1447 (S313) dcKI Post logo on stock
2011.11.22 - Post - Added(Replaced) 1447 (S021) HemmiJapan dcBI logo on slide, 1446 (S020) Made In Occupied Japan, 1445 (S228)
2011.11.22 - K&E Standard - Added N4053-3 Polyphase All glass cursor, plastic blocks. Donated by Martha Prince.
2011.11.22 - K&E Standard - Added 4080-3 (S299) Log Log Duplex Trig (replaced Howard 'Red' Sanford entry which was given to CHM).
2011.11.22.01 - K&E Standard - Added N4080-3 S/N 470704 (S008)
2011.11.22 - Pickett - Added(Replaced) Models N500-ES (S185) Wide Cursor Radiused braces Modern Logo; N500-ES Wide Cursor Radiused braces Round Black Logo
2011.11.22 - K&E Standard - Added 68-1318 Log Log Duplex Trig c1962, 4181-3 (S481) Plastic stock, 4081-3 c1954 with ST scale
2011.11.21 - Pickett - Added(Replaced) Models N901-ES Narrow cursor Square braces round black logo and N901-ES Wide Cursor Radiused braces round black logo
2011.11.21 - Pickett - Added(Replaced) Models N901-T (S181) Square braces round black logo and 1010 Metal Bar Cursor Rounded Braces Triangle Logo
2011.11.21 - Pickett - Added Models N1010-ES Square braces round black logo and 1010 Metal Bar Cursor Rounded Braces Triangle Logo
2011.11.20 - Pickett - Added(Replaced) Model 200 c1949 w/ Alhambra, Ca address, Model 80 (S144), 1010-T (S177), and 1010-ES Square braces round blk logo.
2011.11.20 - Sterling - Added(Replaced) model 584 White (S149), 589 Senior Red Text Slide (S150). Re-ordered listings by model number. Donated by David Sweetman
2011.11.20 - MiscJapan - Added 2 Unknown Makers: Pocket Mannhiem with Linear scales on both edges and a Pocket Mannhiem , Fawick Airflex promo SR. Circa 1965. Donated by David Hecht
2011.11.20 - Pickett - Added(Replaced) Model 300 c1949 (P237)(P216)(P092). Provided detail of stock machining c1949 and c1962. Donated by David Hecht
2011.11.20 - Pickett - Added(Replaced) 200 RCA metal cursor bars, 200 (P095) Nat'l Carbon Co. Model 1006 c1949 (P203). Donated by David Hecht
2011.11.19 - K&E - Added(Replaced) 4181-1 (P084) sn003925 A1B2 artwork Blk Scales Pocket Rule. Donated by David Hecht
2011.11.19 - Acumath - Added(Replaced) Model 1200 (P037) pocket w/ white ends
2011.11.18 - Relay/Ricoh - Added Lafayette F-686 Vector Log, and 99-7055 Vector Log. Rod Lovette Collection
2011.11.18 - Faber-Castell - Added(Replaced) 67/87 Rietz (P034), 67/39 Rietz 5in, 67/39 Rietz 14mm, Donated by David Hecht
2011.11.18 - Pickett - Added(Replaced) Model 160-T Made In Mexico w/Retail Box (P080), 160-CT_w/RetailCard and 160-ES w/Retail Box (P046).
2011.11.18 - Pickett - Added(Replaced) Model 20 (P240), . Donated by David Hecht
2011.11.18 - MiscEurope - Added(Replaced) Diwa model 301 Rietz (S244)
2011.11.17 - Dietzgen - Add model 1725 Vector Type Log Log
2011.11.17 - Acumath - Added(Replaced) models 400 wide stock (S140), 400 Oval Logo (S141) (Fullerton-Acu 400 (S142), 400B Oval Logo(S051)
2011.11.17 - Acumath - Added Models 130, 150 Oval Logo, 400 Mannhiem, 500 w/o logo,
2011.11.17.01 - Nestler - Added Model No. 21 Darmstadt. Has cracked glass
2011.11.17 - SR_Library/Europe - Added 801 Charvoz Roos (M246) and Nr. 89 Rietz (M247) Instructions. Donated by David Hecht
2011.11.17 - Aristo - Added (Replaced): 801 Charvoz Roos and model 89 Rietz Pocket Rule (P066). Donated by David Hecht
2011.11.17 - Post - Added Model 1461 Versalog II 1969 pocket and 1462H Postrig, Donated by David Hecht
2011.11.17 - Scientific Instruments - Added (Replaced): SIC 5050 variant, Donated by David Hecht
2011.11.17 - Relay/Ricoh - Added (Replaced): Lafayette 99-70302, Relay 602, Compass 505 (P219), Micronta 505 (P161) Donated by David Hecht
2011.11.13 - Aristo - Added 801 Charvoz Roos (with Instructions) and replaced P066 model 89 Rietz Pocket Rule. Donated by David Hecht
2011.11.13 - SR_Library/MiscEurope - Added 801 Charvoz Roos (with Instructions) Donated by David Hecht
2011.11.13 - Aristo - Added 801 Charvoz Roos (with Instructions) and replaced P066 model 89 Rietz Pocket Rule. Donated by David Hecht
2011.11.13 - Acumath - Replaced P037 Model 1200 (pocket) (given to CHM by ISRM)
2011.11.13 - Pickett - Replaced P08 Model 160-T (Made in Mexico) and P046 Model 160-ES (both given to CHM by ISRM)
2011.11.13 - Pickett - Added(Replaced) Model 61 Grey Braces (P090) and Model 61 Black Braces (P206)
2011.11.13 - Relay/Ricoh - Added(Replaced) Compass Model 1018 (P119), Made in USA by Bruning, Donated by David Hecht
2011.11.12 - Circular - Sama & Etani/Concise 600P Overhead Projector Model Donated by Carlee Heit, Houston, Texas. Ray Heit Collection.
2011.11.12 - Pickett - Added(Replaced) N200-T Pocket Rule (P191) Sola Basic Ind. Donated by Carlee Heit, Houston, Texas. Ray Heit Collection.
2011.11.12 - K&E - Added(Replaced) 4181-1 C2D1 artwork Pocket Rule (P102) Donated by Carlee Heit, Houston, Texas. Ray Heit Collection.
2011.11.12 - Hemmi - Added Foxboro Flow and Valve Rule. Donated by Carlee Heit, Houston, Texas. Ray Heit Collection.
2011.11.11 - Sterling - Added(Replaced) two model 685's of new variations - Donated by David Sweetman and Model 587 (P019).
2011.11.11 - Donation - Received a large quantity of slide charts and and slide disks from Carlee Heit, Houston, Texas. Ray Heit Collection
  • 3 volumes of slide charts mounted in plastic 3-ring sheets
  • 2011.11.11.04 Pickett N200-T
  • 2011.11.11.03 K&E 4181-1
  • 2011.11.11.01 Foxboro Flow And Valve Rule (Hemmi)
  • 2011.11.11.02 Sama & Etani (Concise) 600P Overhead projector Model
2011.11.11 - SR_Menu - Added Nobema to Manufacturer's list
2011.11.11 - British - Added Nobema Model No 4 Pocket Slide Rule
2011.11.11 - K&E Standard - Added 4092-3 with pat April 1, '24 markings.
2011.11.11 - Pickett - Added 125 (Narrow Stock) and 140 (Narrow stock)
2011.11.10 - K&E Specialty - Replaced S264 Model 4095-3 Merchant's Slide Rule (that was given to CHM by ISRM)
2011.11.10 - Relay/Ricoh - Added Relay 252
2011.11.10 - Pickett - Added 120-T w/Retail Box end scan. Replaced S301 (that was given to CHM by ISRM)
2011.11.08 - Sterling - Added(Replaced) 594 variant, model 594 (S155) (that was given to CHM by ISRM) donation by David Sweetman
2011.11.08 - Dietzgen - replaced model 1767 (S111) (that was given to CHM by ISRM) donation by David Sweetman
2011.11.07 - K&E Standard - Added 68-1892 K-12
2011.11.07 - Emphemera - Added Ole Jorgensen Sliderule Scale Pencil Cup and Photo of Slide Rule and Transistor (found on Ebay)
2011.11.07 - SR_Library/Japan - Added Hemmi P452 Instructions. Scan donated by John Oakhill (Australia)
2011.11.07 - SR_Library/K&E - Added inserts from Duplex decitrig set. 'Horse Sense' by Don Herold and 'Care of Duplex SR'
2011.11.06 - K&E - Added catalog pages (courtesy of McCoy's K&E Catalogs) on 1936 Replacement cursor on 4053-3 specimen
2011.11.06 - K&E - Replaced several 4081-3 and 4092-3 (that were given to CHM by ISRM) with physical specimens donated by Martha Prince
2011.11.06 - K&E - Replaced several 4053-3 in gallery (that were given to CHM by ISRM) with physical specimens donated by Martha Prince
2011.11.06 - Acumath - Added 1240 Pocket slide rule in Retail Box
2011.11.06 - Pickett - Added 120-ES Retail Box end scan
2011.11.06 - Emphemera - Added three Lawrence SR related items from David Rance (UK)
2011.11.06 - K&E - Replaced 4054 in gallery (that were given to CHM by ISRM) with physical specimen.
2011.11.05 - Lawrence - Added Lawrence Engineering Services 10-B with Magnifying Cursor
2011.11.05 - People w/SR's - Added five new pictures, 2 from movies and 3 from Nasa Ames.
2011.11.03 - MiscBritish - Added A.G. Thornton V.P.15, scans by John Sykes (UK)
2011.11.02 - Aristo - Added 0968 Studio, Version 2B, scans and photo by John Sykes (UK)
2011.11.02 - MiscBritish - Added Blundell-Luton P10 with Photo of Brailsford Sykes and Unique five-ten, scans by John Sykes (UK)
2011.11.02 - Home/Ephemera - added MIT Slide Rule Cake for OS 20th Anniversery.
2011.11.02 - Faber - Added Verlag Chemie Chemistry Slide Rule. Included link to instructions at Ron Maley's site (UK).
2011.10.30 - K&E - replaced scan of S045 4058W (CHM) w/ 4058W donated by David Hecht.
2011.10.30 - Ricoh/Micronta - Mirrored Micronta (Nestler) 14/52 to this gallery as this has the majority of known Microntas
2011.10.30 - K&E - Added 4088-3 SN 406555, 1933-34 All glass cursor, flanged blocks
2011.10.30 - K&E - Added 4053-3 SN 917, 1915 All glass cursor, metal blocks, Donated by Martha H. Prince (replacement)
2011.10.29 - Links - Added Tina's Page Tina Cordon Collection
2011.10.29 - Who's Who - Added Tina Cordon, a Geophysical Logging Engineer with a well documented collection.
2011.10.28 - Dietzgen - Acquired 1745 U.S.M.C with Magnifying cursor,
2011.10.28 - K&E - Added new acquisition of 20" K&E 4078 dated 1900-1903 (W. Cox Patent 1891) with brass indicator (chisel cursor) slide rule
2011.10.26 - Faber - Added 2/82, donated by Shiela Russek, Toronto, Canada, In memory of Roman Russek.
2011.10.26 - Aristo - Added D&P System Rietz and 867U, donated by Shiela Russek, Toronto, Canada, In memory of Roman Russek.
2011.10.26 - MiscBritish - Added Unique Electical donated by Shiela Russek, Toronto, Canada, In memory of Roman Russek.
2011.10.25 - MiscEuro - Added two CURTA Model II images from The CURTA Page
2011.10.25 - MiscEuro - Added CURTA calculator catagory with the contribution of Ward Anthony's CURTA.
2011.10.25 - Who'sWho - Added Curt Herzstark (1902-1988), the inventor of the CURTA calculator.
2011.10.25 - Ephemera - Added Tie Clasp Donated by Russell Anthony and 2011 Auburn University Decal donated by Amin Aur
2011.10.25 - Donation from Russ Anthony of specimens belonging to his father Ward Anthony
  • 11.10.25.01 - Curta Calculator
  • 11.10.25.02 - Picket Model 1006
  • 11.10.25.03 - Slide Rule Tie Clasp
  • 12.07.18.01 - Sterling 651 Metric Convertor
2011.10.23 - SR Library - Pickett - Added Model 23 Real Estate Slide Rule Instructions. Scan donated by Ron Kuc.
2011.10.23 - Pickett - Added Model 23 Real Estate Slide Rule and Instructions. Donated by Ron Kuc.
2011.10.23 - SlideCharts - Added Chord Board Slide Rule designed by Martin H. Samuel and donated to ISRM.
2011.09.14 - Who'sWho - Added Tom Martin (UK) and Dr. Sam Friedman (USA). Expanded Rudowski, Barnes, Otnes, van Riet and Wyman bios.
2011.08.29 - Received Donation of two Pickett 120ES for school loaner program by Alan D. Barbour, Fresno, CA
  • Pickett 120-Es w/ sleeve, retail pkg and manual - Replace S145 to ISRM
  • Pickett 120-ES w/ sleeve to SRLP
2011.08.28 - Post - added Versalog 1460 and posket Versalog 1461 donated by Enn Veskimets.
2011.08.23 - Pickett - Replaced Model N3-ES Power Log Exponential Slide Rule with Donation by John L. Crawley, III, Newport News, Virginia
2011.08.17 - Rarities - Added Aston & Mander 1915 Artillery rule, Clay Castleberry Collection
2011.08.16.01 - Sterling - Added owner background to Sterling pocket model 587 Donated by Ron Pearce, of Littleton, Colorado belonging to his father, Finley Carlyle Pearce (1915-1998)
2011.07.21 - SR Dates - Added Fowler Timeline
2011.07.21 - Ephemera - Added 1930 photo of German Merchants using Nestler Cylindrical Slide Rule; and Red Pencil Cup
2011.07.21 - Demonstration SR - Added Faber Castell 315/83N Novo Duplex Demonstration SR (Located At Powerhouse Museum).
2011.07.14 - Pocket Watch - Added FC Calcuigraphe, HC Calculigraphe, Meyrat & Perdeizet, Mechanical Engineer, KL-1, scans from Clay Castleberry
2011.07.07 - Who'sWho - Added Gottfried Wilhelm von Leibnitz (1646-1716) and John W. Nystrom (1825-1885)
2011.06.26 - Military - Repaired umlates to be more compatible to most browsers. Let me know if you see a problem.
2011.06.25 - Glossary - Expanded Jiro Hemmi data, added Hisashi Okura and Maso Bamboo entries.
2011.06.25 - SR Dates - Corrections and slight additions to Hemmi timeline.
2011.06.25 - Who'sWho - Added biography to Jiro Hemmi and added Hisashi Okura, (need photo) and Takeshi Okura to gallery.
2011.06.23 - MiscUSA - Added Arthur Brown & Bro's.Slide Rule.
2011.06.23 - Australia - Added C.O. Browne Long scale circular slide rule, photo by John Wolff
2011.06.23 - Addiator/Troncets - Added/corrected gallery description and historical background.
2011.06.23 - Menu - Renamed Mech Adders Gallery to Addiators/Troncets.
2011.06.22 - SlideCharts - Added links to current manufacturers of slide charts and wheel charts.
2011.06.21 - Menu - Added Australian Griffin, SCA, Ben Jordan, and Yabsley
2011.06.21 - SlideCharts - Added Circular slide rule from Slide Charts of Australia (SCA), Cyril Catt
2011.06.21 - Circular - Added two slide rule scans provided by Cyril Catt, Australia
2011.06.21 - Auatralia - Added seven (7) slide rule scans provided by Cyril Catt, Australia
2011.06.19 - Aristo - Added four slide rules archived from Sphere Research website and HSRC gallery.
2011.06.19 - People w/SR's - Added two (2) pictures, one from the Movie Sky Captain, World of Tommorow
2011.06.19 - ISRM Intro - Added clarification to image prefix codes
2011.06.15 - Relay/Ricoh - Modified Lafayette 99-7102 Vectorlog (Same as F-686) listing.
2011.06.13 - Pickett - Added Model 598 "R" Parameter Slide Rule. Scan by Richard Davis
2011.06.05 - Menu - Added ALKU and Ransley, W. links.
2011.06.05 - MiscEuro - added ALKU Rechenschieber scan donated by Nathan Zeldes, Israel
2011.06.05 - People w/SRs - added two (2) new photos/ephemera, one is a decal from Auburn University from Amin Aur
2011.06.04 - Rarities - Added W. Ransley sector slide rule scan by Nathan Zeldes, Israel
2011.06.03 - Aristo - Added photos of Aristo 203 projector slide rule.
2011.06.01 - Sterling - Added repaired Sterling 584 which belong to ISRM Curator's parents, Les and Susan Konshak.
2011.05.29 - Who's Who - Inducted the late Wayne E. Feely, known for his expertise in Cylindrical SRs.
2011.05.27 - Australian - Added ARCUS slide rule, scan by Cyril Catt
2011.05.25 - Who's Who - Rearranged recipients into two columns. Inducted Bryan Purcell.
2011.05.25 - Menu - Added ISRM What's New webpage, to let users know where to look.
2011.05.25 - Menu - Added Towl, Forrest link.
2011.05.24 - Rarities - Added Forrest M. Towl Pipe line slide rule.
2011.05.16 - Circular - Added Gilson Midget, Donated by Ric Turley im memory of Glenn Wood
2011.05.16 - SlideCharts - Added Piping Selector, Donated by Manual Gimeniz
2011.05.15 - Updated Bernard Boykin entry and photo. He passed on May 12.
2011.05.14 - People w/SRs - added 4 new photos/ephemera.
2011.05.11 - Added picture to David Reub's entry.
2011.05.15 - Search -Added new search engine by JRank. The last one would never update the index.
2011.05.14 - Pickett - Added two models of Dow Chemical Pipe Flow slide rules models 1060 and 1060-ES with picture/bio of original owner, Father of Rick Mandrell.
2011.05.14 - Received donation of Pickett 1060-ES Dow Chemical Pipe Flow slide rule. Donated to ISRM by Rick Mandrell
2011.05.24 - Circular - Added Graphic Chemical Predictor, donated by Ginger Even, in memory of Father, Norman D. Fulton Jr.
2011.05.16 - Circular - Gilson Midget 1932-1936 belonged to Roy Glenn Wood, provided by Ric Turley, Pinecliff, Colorado.
2011.04.16 - Who's Who - Inducted Lieb Stern to gallery.
2011.04.15 - Library-Soviet - Added Lieb Stern Compressor manual (Crylic).
2011.04.15 - MiscUSSR - Added Lieb Stern Compressor Slide rule under LFAI factory.
2011.04.14 - Library-Europe/SA - Added Archimedes and Plastograf (Portugese) manual scans, Donated by Joao Gabbardo, Brazil.
2011.04.13 - MiscWorld - Added Several Archimedes and Plastograph slide rule scans, Donated by Joao Gabbardo, Brazil.
2011.04.09 - Pickett - Model 600ES owned by Andy Keller (1942-2010) donated by his wife. Added variation to gallery.
2011.03.23 - Donation - A variety of 19 basic Slide rules for Student Loan program from David Sweetman
  • Lawrence 10-B with Magnifying Cursor in sleeve painted back - add to isrm
  • Engineering Inst 250-V in blue sleeve - add to isrm
  • Sterling 594 Decimal Trig Log Log - for sale
  • Sterling 594 Decimal Trig Log Log - add to ISRM
  • Sterling 685 Red/Black text
  • Sterling 584 Red/Black Text, In clear plastic hard sleeve - US Navy - Belonged to Walter T. Irwin -Add to ISRM
  • Sterling 584 Black Text - for sale
  • Sterling 584 Black Text - yellowed for sale
  • Sterling 584 Black Text - replace in isrm
  • Sterling Pocket 587 plain - replace in ISRM
  • Sterling Pocket 587 promo - replace in ISRM
  • Sterling Pocket 587 w/ sleeve and instructions - replace in ISRM
  • Pickett Model 3 w/o cursor Very bad
  • Pickett 120-ES wide in sleeve - for sale
  • Pickett 120-T wide in sleeve added retail box - replace in ISRM
  • Pickett 120 trainer in brown sleeve (Black braces) - for sale
  • Acumath 400 - to Loaner
  • Acumath 400 - to Loaner
  • Dietzgen 1767 National - replace in ISRM
2011.02.07 - SRLibrary/Japan - Added Hemmi Mannheim Instructions, Models 30, 32, 34, 34RK, 40RK and 50W. Scan donatred by Alessandro Castellani, Italy
2011.02.28 - Donation - Bonney Forge Piping Sector disk from Manual Gimeniz,
2010.09.13 - Hemmi - Added "Byoutou," 1944 slide rule, owned and donated by Dr. Di Chen, Physicist, Minnisota
2010.08.20 - Donation - Hemmi Electrical SR, Dr. Di Chen, Physicist, Minnisota
2010.06.20 - Donation - Oughtred Society Slide Rule Reference Manual from Clark McCoy, Oughtred Society.
2010.03.01 - Donation - A variety of 9 Slide rules/slide charts from Robert E. Eaton, Univ CO, Boulder.
  • 10.03.01.01 - K&E 4092-3 sn526892 Good, markings on stock, complete sleeve w/markings - Replaced Cursor
  • 10.03.01.02 - K&E 4100 Stadia Slide Rule
  • 10.03.01.03 - Pickett N500-ES HI LogLog Slide Rule w/manual, Favorite Slide rule of Robert E. Eaton
  • 10.03.01.04 - American Airlines Navigational Computer Type "B", Favorite Slide rule of Charles H. Eaton
  • 10.03.01.05 - Concise Science Tables and Slide Rule - US Govt.
  • 10.03.01.06 - Whitehead Holding Pattern Computer
  • 10.03.01.07 - Post 4161 Pocket Versalog Slide Rule
  • 10.03.01.08 - Fosdick Drilling Calculator Slide chart
  • 10.03.01.09 - Metrics Made Easy Slide chart
2010.03.01 - Donation - 23 K&E 4053 7 K&E 4081 Slide rules from Martha H. Prince, Tuscon, AZ. Part of John prince Collection.
2010.09.14 - Ricoh -Lafayette F341 Duplex Log Log Trig Donated by Ed Millis, Dallas, TX
2010.09.09 - Richardson - SR donation by Bill Weinman.Eugene, Oregon
2010.02.10 - MiscJapan - Added Royal 1091, scan provided by Phillip Rodley of New Zealand.
2009.10.27.01 - K&E - N4083-03 owned by Vern Estes, founder of Estes Rockets. Canyon City, Colorado
2009.10.21 - Received donation of slide rule collection belonging to Martin C. Jensen of Redlands, California. Added to Who's Who Gallery
  • 09.10.21.01 - Pickett N4-T Vector Type Log Log, with Round braces and metal cursor bars
  • 09.10.21.02 - Aristo Rietz 89 Pocket Rule
  • 09.10.21.03 - Pickett Microline 160-T Pocket Rule
  • 09.10.21.04 - Pickett N800-T Log Log Speed Rule
  • 09.10.21.05 - Slide Chart Kemet Reactance Calculator Unioun Carbide. Cleveland, Ohio
  • 09.10.21.06 - Slide Chart Delco-Remy QC S-Q-C-Lator General Motors Corp.
  • 09.10.21.07 - Slide Chart Vitramon Reliability Calculator Vitramon Inc.
  • 09.10.21.08 - Slide Chart Mallory Capacitor Calculator Mallory Capacitor Co.,
  • 09.10.21.09 - T & T Fast Calculator, Circular slide rule, with instructions
  • 09.10.21.10 - General Electric - Defense Electronics Division, Circular slide rule, with instructions
  • 09.10.21.11 - Concise 28N Motorola Semiconductors, Circular slide rule, with instructions
2009.01.13 - Hemmi - Added pre-1940 Hemmi manufacturing process web page, translated by Atsushi Tomozawa, Japan.
2009.01.20 - Hemmi - Added Hughes-Owens 1768C dcPA, donated by David Hecht Collection
2009.01.12 - Donation - Received a generous number of slide rules from the David Hecht Collection. We gave David a rare Pickett as a gift
  • 09.01.12.01 - K&E N4088-5 snX6623X New improved cursor c1940-1955
2008.11.17 - Lawrence - Eng. Inst. Printer's Proportional Rule. Donation by Ruth Moyer, Reston, VA. Belonged to Alfred Wilcox.
2008.06.28 - Nestler - Added 1917 Mannheim. ISRM 08.06.28.01. Donated by Marsha Boulton, UK. Used by her great grandfather, Thomas Boulton
2007.02.12 - Aristo - Added 867U donation by Russel Fox, Anchorage Alaska
2006.12.30 - Donation/Pickett - Pickett PEC-531 General Cable - Cable Pressurization Computer, Donated by Bram Wouters, Arizona.
2006.12.20.01 - Donation/Ricoh - Skyline Technolog 151 donated by Bill Boas, Lakewood, CO.
2006.08.04 - Donation - Fedra Log Log dcAug1968 Donated By Seth Balish

Earlier additions to be added as I am able to recreate the history of updates.

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