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
Golden Gem Adding Machine
Automatic Adding Machine Co.
Physical object, ca. 1904
Consul: The Educated Monkey
Physical object, ca. 1916
Newham's Rotary Principal Interest Demonstrator
Physical object, 1846 ca.
Every Man's Own Interest Calculator
Physical object, 1862 ca.
Physical object, 1680 ca.
Burroughs Adding Machine Company
Physical object, ca. 1910
Chadwick Magic Brain Calculator
Physical object, 1955
Flip Chip W850D cable connector
Digital Equipment Corporation (DEC)
Physical object, 1966 ca.
Tower 9 Pocket Calculator
Physical object, ca. 1955
Instrument case with seven instruments
Exactus Business Machines
Physical object, ca.1950
Summa Quanta 20 Calculator
Physical object, c. 1960
Degrees and Cardinal Directions
T. S. & J. D. Negus
Chevalier Charles Xavier Thomas / M. Thomas de Colmar
Physical object, 1850
Selective Educational Equipment Corporation
Physical object, 1968
Millionaire mechanical calculator
Hans W. Egli Co
Physical object, ca. 1930
Fowler's Textile Calculator Short Scale Type
Fowler and Company, Manchester
Physical object, ca. 1905
Mini Card fx-48
Casio Computer Company, Ltd.
Physical object, ca. 1985