The mechanism of the Pascaline calculator of Blaise Pascal as detailed in this page of the famous Encyclopedia by Diderot and D'Alembert in its first folio edition published in 1759.[^Denis Diderot and Jean le Rond d’Alembert, Encyclopédie ou Dictionnaire raisonné des sciences, des arts et des métiers, Société de Gens de lettres, 1st edition, vol. 22, 1759.^] The page has been hand coloured, probably subsequent to publication.
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