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Rulers and slide rules, 1723.

Rulers and slide rules, 1723.
4 0 c m
actual image size: 19cm x 32cm


Carpenter's rule, four-foot gauging rod, Everard's sliding rule, and 'Cogeshals' rule. These last two refer to an Excise officer, Thomas Everard, who proposed his sliding rule in 1684, and Henry Coggeshall (1623-1690). Illustration from 'The construction and principal uses of mathematical instruments' by N Bion (1652-1733), published in London in 1723.

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© Science Museum / Science & Society Picture Library

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