Troncet's 'Totalisateur', c 1895.
3 4 c m
actual image size: 32cm x 26cm

Troncet's 'Totalisateur', c 1895.

Hills, Jennie

© Science Museum / Science & Society Picture Library


Troncet's 'Totalisateur' complete with pencil stylus in a cardboard case. The rotula was a simple device which was the earliest of a number of circular adding machines introduced at the end of the 19th century. The design is esentially that of the 17th century rotula.



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