File:Calculating machines 17.png
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Illustration from 1911 Encyclopædia Britannica, article CALCULATING MACHINES.
Diagram accompanying the explanation of the Hatchet Planimeter.
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| Data/Ora | Miniatura | Dimensioni | Utente | Commento | |
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| attuale | 13:46, 19 nov 2006 | | 402 × 698 (5 KB) | Laverock~commonswiki | Illustration from 1911 Encyclopædia Britannica, article CALCULATING MACHINES. Diagram accompanying the explanation of the Hatchet Planimeter. {{PD-Britannica}} Category:Images from Encyclopædia Britannica {{PD-Gutenberg}} |
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