Clark's hydrometer and other types

Types of hydrometers, 18th century, by Clark 2, 3, John Theophilus Desaguliers 4, Jean-Andre De Luc 5, and William Nicholson 6. Copperplate engraving by Wilson Lowry from Abraham Rees Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Brown, London, 1818

Cyclopedia Dictionary Rees Theophilus

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