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Bollee's calculating machine, circa 1905

Bollee's calculating machine, circa 1905

T404/0137

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Credit

CCI ARCHIVES / SCIENCE PHOTO LIBRARY CCI ARCHIVES / SCIENCE PHOTO LIBRARY

Caption

Bollee's calculating machine. Calculating machine designed and built by the French inventor Leon Bollee (1870-1913). Bollee began working on his calculating machines from 1887, and developed three models: the Direct Multiplier, the Calculating Board, and the Arithmographe. They were the first to use direct mechanical multiplication, as opposed to multiplication by continued addition. This model is similar to a design patented in Germany in 1895. Slides or pegs would be set to the numbers (0-9) on the display, and the multiplication mechanism cranked to produce the answer. One of Bollee's calculating machines contained over 3000 moving parts.

Release details

Model release not required. Property release not required.

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