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Machine à calculer les multiples d'une valeur sur 12 chiffres (J.-B. Schwilgué, Strasbourg, 1844). Cet appareil est proposé à la vente à un prix assez élevé, de 300 à 400 F.
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Invented in the XVIIth century, calculating machines became a small sub-sector of the precision mechanic industry during the XIXth century. While they have been thoroughly studied from the technical point of view, their economic and business history is still largely underdocumented.
In France, between the 1820s and 1850s, several inventors-entrepr...
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