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What's New at ISRM and Ongoing BlogMost recent Activities, Gifts, Edits and Additions
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NEW MEET ID!! On-line virtual face-to-face coffee.social get together. Three times/week. Two times on Wednesday and once on Saturday. The UTC time will change according to Colorado Daylight Savings Time.
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The meeting are put into three sessions because of Google Meet's one-hour limitations on a free account (Google will give use a 5-minute-warning as the end approaches):
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Or use a tiny URL link, which is easy to remember:
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Get the ISRM app for your Android for quick access to the ISRM website, Google Meet and Instagram |
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Vol 1 - Hemmi Vol 2 - K&E Vol 3 - Pickett Vol 4 - Dietzgen Vol 5 - Post Vol 6 - Japan OEM Vol 7 - Aristo Vol 8 - Faber-Castell Vol 9 - Nestler Vol 10 - Español Vol 11 - Deutsche Vol 12 - American Vol 13 - British Vol 14 - Pocket-Watch Vol 15 - Electrical And Radio Vol 16 - Air and Sea Navigation Vol 17 - Francais |
Vol 18 - Military & Aerospace Vol 19 - Civil and Industrial Vol 20 - Miscellany and Rare Vol 21 - Russian Cyrillic Vol 22 - Chinese Hànzì Vol 23 - Indonesian Vol 24 - Nederlandse Vol 25 - Nederlandse II Vol 26 - Italiano Vol 27 - Italiano Nestler Vol 28 - Italiano II (Textbooks) Vol 29 - Pickett II Vol 30 - Catalogs 1881-1939 Vol 31 - Catalogs 1940-1977 Vol 32 - K&E II Vol 33 - K&E III Vol 34 - K&E IV Vol 35 - Flight Computers |
NEW! ISRM Slide Rule Instructions Library is now published on Amazon.
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 NEW! You can get custom wall clocks with images of popular circular slide rule models. These were inspired by the Friends of the Museum that come to the weekly social hours. So far ISRM has created face of Gilson (yellow and green), Concise 270N, Pickett 110-ES, Alro 100R, Dalton Dead Reckoning Computer E6-B (White and Black) and the B-47/B-52 Air Nav & Bombing Computer, as well as clocks using the ISRM logo. |
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ISRM is a 501(c)3 (A57 - Science and Technology Museums) entity through the State of Colorado. Colorado ID Number 20181884948, IRS EIN 83-2486423, operating as a non-profit corporation as International Slide Rule Museum dba ISRM. All donations to ISRM are tax deductible. If you are wondering about the process of creating images for posting slide rules specimens, here is a 7 minute video captured from my screen while editing the many scans required to document a slide rule into one single image.ISRM Scanning Procedure Screen Capture
YYYY.MM.DD-## - Gallery - Description of Edits, Additions[Replacements], Gifts or Donations.
2023.03.27.01 - Received Acu-math No.47 yellow stock Mannheim. Oval logo. 2023.03.25.01 - Received Versalog 1460 dcJF belonged to Mel L. Frost, gifted by Les Frost and Marion Nurse.of Kanata, Ontario, Canada. 2023.03.11 - Pickett - Added[Replaced] 109-ES gift of Stephen Harper, added Bio of Father Dr.A.Edwin Harper. N526-ES StatRule gift of Eric Anderson. 2023.03.10 - K&E Added 4071T Polyphase Trig 1912 and 4088-3 Duplex Trig 1921. 2023.03.08.01 - Pickett - Received Pickett N-525-ES Stat rule 1965. Gift of Eric Anderson of Elmhurst, Illinois. Like new.Brown leather sleeve. - replaced 13.07.03.16 2023.03.07.01 - Acquired K&E 4071T DuplexTrig Lot98 (or 86) 1913 AGC w/leather sleeve marked "Dan Kuhn" [Replaced S431] 2023.03.01 - Received gift of slide rules from Michael L. Davis of Colorado Springs.
2023.02.28 - Nestler - Added Nestler Slide Rule Date Tracing by Guus Craenen (IM1995 Proceedings) to bottom of page. 2023.02.28 - KE_Standard - Added 4090 2-slide Universal with edge cursor. 2023.02.28 - Yearbooks - New gallery. Created a mirror copy of People w/SRs in order to extract Academic yearbooks photos to reduce the size of the other ephemera galleries. 2023.02.28 - People w/SRs - Now at 1000 photos! Added 15 photos, 10 gleaned from sightings listed in an archive ISRG database, courtesy of Rod Lovett. 2023.02.28 - Aerospace - Added AT-9 and B-34/37 Load adjuster slide rules with reference photos from wikipedia. Scans by Noh Stegman of the Tri-Stae Warbirds Museum. 2023.02.24 - People/Ephemera - Harvested actors with slide rules that were mentioned in the ISRG data base on Rod Lovett's site. 2023.02.21 - SR Loaner - Sent 25ea Fedra Log Log to Michael feeback, GKentucky Governor's Scholar Program, Elkhorn Crosssing School, Georgetown, KY 2023.02.21 - UnitedStates - Added American Spring, Associated Spring and Connecticut Spring brands. Duplicated in Pickett and Acumath galleries. 2023.02.21 - UnitedStates - Added bio and slide rules belonging to Howard Malcolm Smith. Added bio for Wallace Barnes founder of Associated Spring. 2023.02.11 - Received Sterling 687 (587) pocket slide rule in retail package along with 3 other Sterling products. Gift of David Teuton. Belonged to father Max D. Teuton, 1953-1998. 2023.02.08 - SR_Course - Revised content and updated downloadable PDF of self-paced seminar with ISRM logo and minor web page changes. 2023.02.08.01 - Received Silver-Reed SR84 electronic slide rule calculator from Serbia. 2023.02.06.01 - Received Pickett 1000 ortho-phase duplex magnesium.Gifted by Jim Brandyberry of Indianapolis, IN. Belonged to father Howard W. Brandyberry (1913-1971). Howard W. Brandyberry was a lifelong teacher and United States Army veteran who lived in Indiana from 1913 to 1971. He was also a high school basketball coach 2023.02.05 - Received slide rules belonging to Howard Malcolm Smith (1897-1966). Gifted by Bruce Moody of Fort Mill, South Carolina. . 2023.02.04 - Post - Added 1447 DP Student Projection Slide Rule, with instructions and overlays. Gift of Michael Rosenborg of Canyonville, Oregon 2023.02.01 - Received gift of slide rules and Adders from Stephan A Harper. Belonged to Dr. A. Edwin Harper, Jr.(1919-2001) an eminent American psychometrician who worked for the United Presbyterian Church of the USA.He spent his entire working career in India.Coauthor Dr A Edwin Harper, jr and Dr VS Misra, in their book 'Research on Examination in India', published by NCERT 23.02.01.01 - Pickett 109-ES Circular with manual and black sleeve.replace ISRM 04.09.27.05 in gallery
| 23.02.01.02 - Lafayette Concise 270.with black sleeve. to gallery
| 23.02.01.03 - Takeda Concise 28 with sleeve and manual Takeda Drawing Instruments Mfg.To gallery replace C27
| 23.02.01.04 - DK Statistical Slide Rule. A cardboard slide chart by The Psychological Corp. ©1933, 1938 to gallery
| 23.02.01.05 - Universal Metric Converter Pencil cup. Duplicate
| 23.02.01.06 - Magic Brain Calculator with stylus (Japan) and instructions -duplicate
| 23.02.01.07 - Wizard Calculating Machine with wallet (Germany) MagicBrainInstand instructions.- duplicate
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2023.01.24 - Began adding thumbnails to the galleries of the relevant Volumes of the Slide Rule Instructions Library.2023.01.24 - Concise - Added No. 300 and Lietz branded 3626-25 Stadia Computer. Gift of Cindy Tate. 2023.01.23 - Aerospace - Finished adding 37 aviation flight computers, gifts of Cindy Tate (Victor B. Tate collection), Andrienne Ervin (Kenneth Ervin Collection), JoAnn Lynn (Joel Lynn collection). 2023.01.19.01 - Received gift of Triumph LS826 Electronic (slide rule) calculator (Japan) from Patrick Craig of Dayton, Ohio. Belonged to Michael A Brady, Chief Geologist for Parsons.com 2023.01.05 - Aerospace - Restructured online gallery into several catagories for easier navigation to style. 2023.01.04 - We received the sad news that Irene Dennert (Aristo family) passed away on December 3, 2022.She was 95 years old. 2023.01.02 - Received slide rules for loaner program from Michael Rosenborg of Canyonville, Oregon Michael is a retired High School teacher with a Master degree in mathematics. He re-gifted these slide rules to ISRM that were used in his classes. He received them fron a USENET group. 2022.12.23 - Published Flight Computers Volume 35 on Amazon in paperback, hardcover and kindle (revised process - much improved) 2022.12.20 - Editing manuals for Volume 35 Flight Computers 2022.12.11 - Published K&E IV Volume 34 in paperback, hardcover and kindle (revised process - much improved) 2022.12.06.01 - Received Brother 718SR electronic calculator. sn F0092957. Made in Japan. 2022.12.06.02 - Received Privileg 585D-E electronic calculator. sn17352 distributed by Quelle in germany. 2022.12.06.03 - Received Santron 71SR electronic calculator. 2022.12.06 - Published K&E III Volume 33 in paperback, hardcover and kindle (revised process - much improved) 2022.11.28 - ISRM updates delayed due to COVID 10 day quarantine. 2022.11.24.01 - Received Omron 10SR Electronic "Slide Rule" calculator. Green VFD. With manual (EN & DE) and sleeve 2022.11.16.01 - Received Foxboro Valve Sizing slide rule 1939 Stainless steel. Gifted by Daniel Hirshfield of Turnbull, CT. belonged to father Joel Bentley Hirshfield. 2022.11.14.01 - Received Digi-Matic D-8 ESR Calculator. Sears, made in Japan. 2022.11.12.01 - Received Aero Products Research (APR) E6-3B Wind Triangle Computer.Made possible by a gift from Caroline Soles and John Phillips of High River, Alberta Canada. John has retired, but used to own a small helicopter company called Cascade Rotors with his brother. Caroline used to be a scuba instructor, and is currently learning how to fly. 2022.11.11 - Pickett - added N300-ES w/Modern logo. Gift of Leslie Dormanen. 2022.11.07.01 - Received a Bowmar MX-90 sn252588 (with mx-100 function keys) electronic calculator for upcoming book. 2022.11.04.01 - Received a Bowmar MX-100 sn202094 electronic calculator for upcoming book. 2022.11.03.01 - Received a Bowmar MX-90 sn246551 with charger and manual. 2022.10.29 - KE_Standard_Adde N<4053-5> 20-inch polyphase mannheim with flanged AGC. Gift of Cindy Tate. 2022.10.29 - Concise - Added[Replaced] Stadia Computer ISRG Herman van Herwijnen Memorial Edition 2004 with instructions. Gift of Frank W. Cole. 380 Radio Computer ISRG Edition (ebay photo. 2022.10.29 - Dietzgen - Added 1767P National (wood), 1768P Reliance (Mahagony/Charvoz-Roos), 1768-P (Plastic Fuji), Gifts of John Holmes and Leslie Dormamen. 2022.10.29 - Pickett - Added N4-T Vector Log flat lens, round black logo. Gift of John Holmes. N200-T Nat'l Science Teachers Assn. "Compliments of Pickett" gift Randall Kirschman 2022.10.29 - Aerospace - Added two Sillcock-Miller aviation True Air Speed calculators. 1943 Navy version Gift of John Holmes. 2022.10.29 - France - Added Marc-Unis 13cm mannheim Thin film cursor. Gift of John Holmes. 2022.10.29 - Graphoplex - Add 640 electric log log variant. Gift of John Holmes. 2022.10.29 - Received gift of 6 slide rules belonging to Leslie Dormanen of Wheaton, Illinois.add to accession numbers from 2022.10.13.XX 2022.10.28 - KE_standard - Added Mystery Mannhaeim, gift of Judy Johnson. N<4041&rt> gift of Cindy Tate. 4091-3 w/flanged cursor gift of leslie Dormamen. 2022.10.28.01 - Received Hanimax Electronic Slide Rule calculator. 2022.10.27 - Post - Added 1452 Universal c1940 Teledyne-Post 44CH-500 Versatrig, Gift of Cindy Tate. Post 1447 cWWII (Charvoz-Roos) Gift of Leslie Dormamen. 2022.10.27 - SIC SINCO - Added 1510 Astrolog w/square braces. Gift of Dave Zoumaras. 2022.10.27 - Ricoh - Added Engineer's 1510 Multilog Duplex. Gift of Leslie Dormamen 2022.10.26 - Hemmi - Added 50/1 Advanced Manheim (1928). . 2022.10.26 - Aristo - Added 967U w/transparent scales. Gift of Leslie Dormamen 2022.10.26 - Post - Added 1444-P and 1452-P (both made by Bruning). Gift of Cindy Tate. Teledyne-Post 1441 (Hemmi) gift of Leslie Dormamen 2022.10.26 - Nestler - Added Nestler's Universalschieber 1904 Scan By Andreas Fassbender 2022.10.25 - Nordic - Added Letter to Marvin Clarence from the Queen of Denmark in support of ISRM 2022.10.25 - KE_standard - Added N4053-3 Gift of Dave Zoumaras. 2022.10.24.01 - Received gift of Concise Stadia Computer herman van Herwijnen Memorial Edition 2004 by Frank W. Cole of Hutchinson, Kansas. replace 21.08.12.02 2022.10.20 - Ephemera - Corrected formating of rows 120-140 2022.10.15 - Received gift of a variety of slide rules and books belonging to Dave Zoumaras of San Diego, California. Belonged to father-in-law. 2022.10.07 - Aerospace - Added - T.O.P Computer 1971, Jadur 10-second Flightmaster 1937. Telex E-6B FDF-57 1975.Gift of Andrienne Ervin. 2022.10.05 - Aerospace - Added Bastion Brothers Co. Dalton Mark VII Aircraft Navigation Computer. 1934. Gift of Andrienne Ervin. 2022.10.05 - KE_Standard - Added 4088-3 c1935 belonged to Kenneth Edward Ervin (1920-2002). Gift of Andrienne Ervin. 2022.10.05 - Aerospace - Added another B-24 bomber load asjuster slide rule with bios and photos of Kenneth Edward Irvin. 2022.10.04.01 - Received Pickett 200-T promotional "National Science Teachers ass, 1962 convention, compliments of Pickett" gift of Randall Kirschman, Ph.D. 2022.10.04 - KE_Standard - Added K&E 4080-3 Log Log Duplex Trig sn059302 1944 in retail box. Cindy Tate collection. 2022.09.27 - KE_Standard - Added[Replaced] 4031 5-inch mannheim, 68-1608 20-inch Polyphase and 4053-2 Mannheim 1924, Joel L. Lynn collection. 2022.09.27 - Post - Added[Replaced] 1451 Versatrig Pocket Duplex, Joel L. Lynn collection. 2022.09.27 - Dietzgen - Added[Replaced] 1757 Primatrig, personal slide rule of Joel L. Lynn (1943-2022) 2022.09.25 - updated Slide rules for sale/adopt page with additional offerings. 2022.09 24 - Received 3-D printed cursor blocks from Kenneth and Matthew Gilley. 2022.09.24 - KE_Standard - Added 68-1281 Jet-log and 68-1581 Jet=Math pocket slide rules. Gift of JoAnn Lynn.Joel J. Lynn Collection. 2022.09.23 - Pickett- Added B1 Powerlog /sleeve, N16/N600 Twinpack, N600-ES w/Magnifyer, and X-4 Exective Vectorlog. Gifts of JoAnn Lynn. Joel J. Lynn Collection. 2022.09.21 - Sent numerous slide rules to Trevor Penner of Hillsboro, Kansas for a demonstration. 2022.09.20 - Received gift of a slide rule collection from Andrienne Ervin belonging to her father who ran an FBO (airplane mechanic) in Utah . 2022.09.13 - Received gift of a slide rule collection from JoAnn Lynn from Washington, DC., in memory of her husband Joel J. Lynn (1943-2022)
2022.09.01 - Received Slide rules and manuals, with photo and bio, from Ronald Ropke (6-11-2042 - )of Grosse Pointe, Michigan, |
