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Calculating scale, 1807.

Richardson, Claire

Calculating scale, 1807.
3 4 c m
actual image size: 32cm x 26cm


A ready reckoner, made of boxwood weighted with bras, for calculating gros and tare weights of ship's cargoes, engraved; 'Robert Ludgate, Custom House, London, 1807'.

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© Science Museum / Science & Society Picture Library

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