Gunners calculating the elevation of a piece of artillery using a clinometer and a quadrant marked with shadow scales. Around them are barrels of gunpowder, cannon balls of various sizes. On the left a mortar is being discharged. From 'Architechtur .. Mathematischen .. Kunst' by Gaultherius Rivius (Nuremberg, 1547). Woodcut.

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Gunners calculating the elevation of a piece of artillery using a clinometer and a quadrant marked with shadow scales. Around them are barrels of gunpowder, cannon balls of various sizes. On the left a mortar is being discharged. From 'Architechtur .. Mathematischen .. Kunst' by Gaultherius Rivius (Nuremberg, 1547). Woodcut.

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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

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