GEM calculator, 1890.

Made:
1890-1900 in England
maker:
Unknown
GEM calculator, 1890.

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"Gem" calculating machine, J. Guthrie's patent No.15062, 1890

Gem' calculating machine, J.Guthrie's patent No 15062, 1890. The GEM calculator is a simple device for the addition of English money. Numbers are added by inserting a stylus against the figure and pulling downward.

Details

Category:
Mathematics
Object Number:
1905-118
Materials:
wood (unidentified), paint, paper (fibre product) and metal (unknown)
Measurements:
Overall: 220 mm x 105 mm x 5 mm, 0.07 kg
type:
adding machine (stylus)
credit:
Major-General H.P. Babbage

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