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Posts Tagged ‘history’

Slide Rule - calculations

Moving forward from Napier Rods and Napier’s contribution to calculating sticks based on the gelosia, or lattice, multiplication method. In 1620 Edmund Gunter of London makes a straight logarithmic scale and performs multiplication and division on it with the use of a set of dividers, or calipers. In about 1622 William Oughtred, an Anglican minister [...]