Nicholson hydrometer in case with 2 thermometers

Nicholson hydrometer in case with 2 thermometers

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Nicholson hydrometer in case with 2 thermometers
Science Museum Group
© The Board of Trustees of the Science Museum

Nicholson hydrometer in case with 2 thermometers, weights and tweezers, made by Negretti and Zambra, English, 1850-1920