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Assigned missing ascension numbers to some slides rules for list 20 - Received gift of slide rules belonging to John Robert Baumann. Belonged to her father 20 - Slide Rule Rescue - Added K&E slide rules to the duplicates list.More coming 20 - Slide Rule Rescue - Made a PDF of duplicate Pickett slide rules available for adoption. 20 - Pickett - Added[Replaced] Model 2-T Dual Base Log Log (1957)Reciprocal Scale. Kornchuk of Caribou, Maine 20 - Pickett - Added[Replaced] Model 121 Trainer (grey braces), N803-T Log Log Speed Rule Dual Base (1960-75), Gift of Peter D. of Olympia, Washington N803-T - Log Log Speed Rule Dual Base 1960-75 20 - Americas(Mex/SA) - Added Keplar No.gift of Mike Weaver, United Kingdom 20 - German/DDR - Added[Replace] Reiss 3214 Darmstadt-Record [REF], and Reiss 3212. 20 - Ephemera - Added 26 new ads containing slide rules from various old electronics magazines. 20 - Calculators - Added Casio Memory-8A, FX-19, FX-250. 20 - Calculators - Added Qualitron 1444 Slide Rule V1, V2, v3. 20 - Concise - Added Sama&Etani 600-T Reference Tables. Gifted by his friend Alice Bowling of Louisville, Kentucky. 20 - Received gift of slide rules from Barbara Cunningham, belonged to Brian Charles Cunningham (1935-2013), Willagee, W. Their son Andrew Inherited them but wished to donate his Dad's collection to ISRM.Gift of Leroy Hausler Collection 20 - Ricoh - Added/[Replace] Lutz No.102 S U. 20 - Calculators - Added Casio Multi-8, Kings Point SPM-100 slide rule, Corvus 411 slide rule, box images for Lloyds Accumatic and TI SR-56 20 - Received gift of 100 slide rule manuals, catalogs, and related ephemera from Janet and Paul Laughlin of Jenkintown, PA. National Semiconductor Mathemetician, TI SR-56P, APF 31 and APF 50 slide rules calc. 20 - Received slide rule collection belonging to Leroy G. Donated By Dorinda Wong 20 - Received donation from Richard Burns. Included in the collection is his 1981 book: Fundementals of Natural Gas Conditioning .01 - K&E 4081-3 Log Log Duplex Decitrig sn703557. Personal slide rule used by Robert N.(Bob) Curry at Western Kentucky Univ. Same as gallery specimen ISRM .01 20 - Received donation from Wayne R Pinnow, Wisconsin 20.01 - Received gift of 4051-5 20" slide rule from Joseph J. 20 - SR_Dates - Updated Pickett Timeline with contributions by Douglas Harland 20 - Ephemera - Added scans of Arizona newspaper articles about Pickett in Nogales.ISRM Scanning Procedure Screen Capture Jim Cerny has now begun to host his collection on the ISRM Associates page beginning with a tribute to Ed Chamberlain. 20 - SR_Whos Who - Added Walter Richard Evans (1920-1999), inventor of the Spirule 20 - Misc USA - Added The Spirule Co. Petersburg, Russia 20 - Received a donation from Mark Mc Carty 20 - Received gift of slide rules and books from the Terry Whitsel of Loveland, Colorado 20 - Created a Facebook Page "ISRM". 20 - KE_Standard - Added K&E N4080-3 Loig Log Duplex Trig sn743809 Laminated Mahogany bio of original owner John Robert Baumann 20. 20.01 - Received gift of Jason 801 from Michael Banks.catagory and two examples of the Spirule, Root Locus slide rule, one from Nathan Zeldes 20 - KE_Standard - Added 4088-3 Polyphase Duplex c1927 belonging to Peter Brooks Morton (c1938-2017) with bio. Search ISRM or @sliderulemuseum 20 - Received approval from Amazon to be a supported charity when you buy using on smile.20 - Hemmi - Added two variants of 50W. - New acquisitions received 20 - Received donations for slide rule adoptions from Philip Rodley, New Zealand and 20 - Duplicates For Adoption - Added K&E, Pickett, Dietzgen and Faber-Castell 20 - Received donation from Michael Mjelde, a continued Patron of the Museum 20 - Duplicates For Adoption - Updated with available circular slide rules to the Adoption list. Agreed to send 3 slide rules in trade to friends children 20 - Pickett - Posted Model 114C Pocket Metric Conversion. 20 - Received gift of slide rules from Janet Dupont of Wacona, Minnessota.
Colorado ID Number 20181884948, IRS EIN 83-2486423, operating as a non-profit corporation as International Slide Rule Museum dba ISRM. which disturbs some visitors and may have prevented them from perusing the site or downloading files, or making needed donations.
20.01 - Germany - Received and added Freidmann Mannheim RRTracks Scales Riveted Laminations English 20 - SR Whos Who - Added Allan J. 20 - Pickett- Added 2007 JOS article at bottom of page: "Recollections of a Pickett Industries Employee" by Allan J. 20 - Lawrence - Added note to Lawrence 10-C Engraver's slide rule. Gift of Leroy Hausler Collection 20 - K&E_Standard - Revised bio on John Vincent Atanasoff origination of the first Digital Computer. 20 - Pocket Watch - Added Fowler Universal Calculator belonged to Richard Levy 20 - Concise - Added Sama &Etani 600 (AVCO) belonged belonging to Richard Levy 20 - Received 4 slide rules belonging to Richard Levy (1932-2017). 20 - Misc USA - Added Perrygraph SR catagory for slide charts with slide rules scale. B-23, Type Made in Switzerland 20 - Misc USA - Lietz catagory. 20 - Aerospace - Added Aeronav Instruments Private Pilots Flight Computer Model-I. Gift Of Ed Millis 20 - SR_Whos Who - Added entry for Millie Ludwig, who owned Grafton Plastics of Grafton, Wisconsin, that made rebranded slide rules for companies like Bruning and Post. Gift Of Ed Millis,br 20 - Dietzgen - Added 1735 Vector Type Log Log Rule, sn 111567. 20 - SR_Loaner - Added photos of students from University of Iowa. Cynthia Farthing Ph D held a seminar titled "Uncovering the Hidden Figures: Women's Role in Mathematics and Science from World War II to Today". Gifted by wife, Barbara 20.01 - Received gift of S. Gift Of Pam Eaton of Dennis, Massachusettes 20 - Acumath - Added(replaced) numerous models slide rules to the gallery.
Typo in brand name Lawrence "Enginering" Service instead of "Engineering". Gifted by his his wife, Midge Levy, and his son Benjamin Levy of Vancouver, Washington. 20 - Pickett - Added Photo of Polly Hattemer of Redondo Beach to her Pickett N-16-ES slide rule 20 - Nordic - Added scans of Diwa 621, 631 Duplex, 641, 661; UTO 602, 631, 661, 651U Duplolog, 651U Darmstadt. 20 - Misc USA - Added 2 American Journal Gas Flow Computers to Whitehead and Hoag brand. Added 1894 Science and Engineering magazine article on the Lietz company 20 - Circular - Moved T&T Fast Calculator to Misc USA Gallery. 20 - SR_Terms - Added entry for Grafton Plastics of Grafton, Wisconsin, that made rebranded slide rules for companies like Bruning and Post. 20 - Received gift of 3 slide rules belonging to Arnold D. Gift of Ed Millis 20 - KE_Standard - Added[replaced] 4058C Beginners Slide rule, Version 1 [S478}, 4058C V2. 20 - KE_Specialty - Added N-4100 Stadia rule sn623559. 20 - KE_Standard - Added[replaced] 4035 Lot 2 all-glass cursor. 4093-3 Duplex Vector sn52044 [S263], 4088-3 Log Log Duplex Vector sn833117 1952[S013]. 20 - SR_Loaner - Added photos of students from Mount Vernon Middle School. 20 - Ephemera - Added images from 4 movies or TV shows showing slide rules. 20 - Library/Pickett added M375 How to Use The Deci-Log Log Slide Rule (Model 2). Gift Of Steve Stewart 20 - Pickett - Added(replaced) numerous models slide rules to the gallery.
20 - Acquisitions - Calculators: Kings Point Model KP-460, Kings Point SC-11, TI SR-56 Programmable SLIDE-RULE, Lloyds Accumatic 999 Microelectronic Slide Rule, APF Mark 8601 Scientific Slide Rule 20 - Ephemera - Added Venus Perfect Drawing Pencils Ad with Slide Rule 20 - Novelty - Added Ruxton Multi-Vider Slide rule pencil. 20 - France - Added Framed Circular Slide Rule, Unknown Manufacturer, Phot0 provided by Nathan Zeldes in Jeruselum, Israel 20 - Post - Added[Replaced] Post 1447 Made In Occupied Japan S452, Leroy Hausler Collection. 20 - Aristo - Added Dennert & Pae (D&P) No.21 Elektro Log Log. 20 - KE_Standard - Added[Replaced] 4088-3 Polyphase Duplex sn137431 1927, Gift of Ellen Hathaway. Gift Of Leroy Hausler Collection 20 - KE_Standard - Added K&E 4092-3 Log Log Duplex sn282613, 3 Patent Dates (Pat. 22, '08 - April 1, 1924) Gift Of Bill Boas 20.01 - Military - Added Howitzer 155mm High Angle 7R Charge Vietnam Era slide rule Oct1972 to existing set. 20 - KE_Standard - Added N4083-3 sn833117 Vector Log Log bio info, Belonged to Claude Ellis Johnson (1918-2003) NASA Engineer, Huntsville, Alabama. Gift of Phil Stanley 20 - British - Added [Replaced] Simplon Bi Lateral Log Log [S107]. Best known as an appraser on the PBS series Antique Road Show. Updated 20 - Received donation from Michael Vinarcik.
various sources 20 - SR_Patents/GB and BE - Added Ruxton Multi-Vider Slide rule pencil 20 - SR_Library/Post - Added Post Model 1464 8inch Binary Circular Slide Rule. 20 - KE_Specialty - Added 4095-3 Merchant's Slide Rule with PDF of Manual and Cooks Radio Rule (no model number). Bachelor collection 20 - Pickett- Added Pickett N800-ES Log Log Speed Rule, Gift of John Kachold 20.01 - Received gift of Pickett N800-ES Log Log Speed Rule, gift of John bought during high school. 20 - Calculators - Added 3 Silver-Reed Slide Rule Calculators using photos from other sources (attributes noted). 20 - The ISRM oversite committee authorised the purchase of a few Electronic Slide Rule Calculators of historical significance. Notes from daughter, Claudia 10/15/07 20 - SR_Library/KE - Added M345 K&E Polyphase Duplex Trig No. 20 - Aerospace - Added Goble Airline Pilots Flight Computer. 20 - KE_Standard - Added[Replaced] 4056 Favorite sn818452 [S053] gift of Ed Millis, 4056 Favorite sn563371 black Cursor, gift of Pamela Eaton. Gift of Phil Stanley 20 - Misc Japan - Added new brand Taisho Kogyo No. Gift of Phil Stanley 20 - Hemmi - Added Geotec 341-3690 Versalog II. 20 - Orient/East Asia - Added[Replaced] Flying Fish 1200 Duplex Log Log. 20 - Received gifts of 18 slide rules/slide chart from the collection of Phil Stanley of The Analytical Engine, Worcester, Massachussets. 20 - Lawrence - added rare 10-B with magnifyiong cursor and 8-B artwork on the back 20 - Faber - Added A. Faber Castell 1/60 Mannheim date code June 1940 20 - Post - Added(replaced) 1450 Versatrig for dc TD1953. (S075) 20 - Hemmi - Added 251 MIOJ Cursor, for Mechanical Engineer dc DC1953 20 - Misc_USA - Bruning 2401 Pocket Slide Rule Texas Instruments Promo.