Gwen Bell Artifact and Book Collection
This rare and important collection comprises written works and physical objects relating to early calculating instruments and methods. These works and objects are held in the permanent collection of the Computer History Museum after generous gifts in 2012 and 2014 by Museum co-founders Gwen and Gordon Bell. The text items in this collection comprise works written in French, German, Latin and English. It begins in the early 17th century (ending in about 1980) and includes dozens of works such as mathematical, accounting, farming, astronomy, merchant and engineering tables, monographs on slide rules, arithmometers, planimeters, sectors, Napier´s Bones, military compasses, telescopes, as well as later-day commentaries on these instruments and their history. The written works are available online in scanned (PDF) form using the search function below. The object collection was established as a complement to the rare book collection and both serve to document the early origins and development of human measurement and computation. Its objects include: abaci, sectors, linear, circular and cylindrical slide rules, mechanical and electrical/electronic adding machines and calculators, and replicas of early calculators such as the Pascaline and the Schikard. With both written sources and complementary physical objects, the Bell Collection offers researchers a unique window into the early origins and development of history´s most significant calculating devices and methods.
Search Gwen Bell Artifact and Book Collection
Geigy pocket watch
Keiki Co., Ltd.
Physical object, ca. 1700
Comptometer adding machine
Felt & Tarrant Manufacturing Company
Physical object, 1920 ca.
ENIGMA Encryption/Decryption Device
Physical object, 1935 ca.
Richmond Educational Spelling Board
Richmond School Furniture Company
Physical object, (c) 1940
R. Waddington, Coventry
Physical object, 1900 ca.
Victor Adding Machine Company
Physical object, Ca. 1935
SQUEE: The Robot Squirrel
Physical object, 1940 ca.
Morris's Measuring Instrument
Simplex Portable Typewriter Special Demonstrated Model S
Simplex Typewriter Company, Inc.
Physical object, 1930
Corona Four typewriter
Corona Typewriter Company, Inc
Physical object, 1920
Thacher's calculating instrument
Keuffel & Esser Company
Physical object, c. 1903
K & E Compensating polar planimeter
Keuffel & Esser Company
Burroughs adding machine Model A
Hex adder (hexadecimal stylus / rack adder)
Fraction of an inch adding machine (circular stylus adder or slide rule)
Electric Adding machine
United Chemical Engraving Co. Ltd.
Felt and Tarrant Mfg Co.