Titel
Leon Bollee, French mathematician and inventor, c 1890.
Caption
Photograph of Bollee (1870-1913) operating his calculating machine. Bollee’s machine was one of the earliest of its type and was a direct multiplier with a built-in multiplication table. Later on Bollee was more interested in designing, building and racing sports cars., 7022811
Aufnahmedatum
01.01.2009
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Science & Society / FOTOFINDER.COM
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10401779
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3504px x 2410px, 29,70 cm x 20,40 cm (300 dpi)
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France
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7022811
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