Thomas Arithmometer design details, from M. Hoyau, "Bulletin de la Société d'encouragement pour l'industrie nationale"

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Date
November 1822
Photographer
Courtesy of Valéry Monnier
Keywords
Stepped drum; Mechanical calculation; de Colmar, Thomas; Arithmometer
Object ID
500004220

The Society concluded that, “It is really not possible to combine the parts of this instrument any better than he has done in order to overcome the predicament of the subject,” and awarded de Colmar a gold medal.