(:title Mechanism of Thomas de Colmar's arithmometer as in 1862:)
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%center%1862: Diagram of the Thomas de Colmar arithmometer mechanism.[^ Franz Reuleaux, //Die Thomas’sche Rechenmaschine//, Freiberg, 1862 reproduced in Reuleaux’s article in //Der Civilingenieur//, 8, 1862, and reproduced in turn by Stephen Johnston, "Making the arithmometer count", //Bulletin of the Scientific Instrument Society//, Volume 52, 1997, pp. 12-21., see figure 2.^]\\(Source: Museum of the History of Science, University of Oxford.)

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