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/ 6
alcohol hydrometer and thermometer

alcohol hydrometer and thermometer

German
circa 1850
Baumé hydrometer

Baumé hydrometer

Joseph Long
1821-1840
Baumé hydrometer

Baumé hydrometer

Joseph Long
1821-1840
Baumé hydrometer for sulphuric acid

Baumé hydrometer for sulphuric acid

Electric Storage Battery Company
circa 1900
beaume and specific gravity scale for light liquids

beaume and specific gravity scale for light liquids

German
late 19th-early 20th Century
copper hydrometer

copper hydrometer

American
1820-1850
Dicas's hydrometer

Dicas's hydrometer

John Dicas
1780-1810
glass hydrometer

glass hydrometer

German
1902-1914
glass hydrometer

glass hydrometer

German
1902-1914
glass hydrometer

glass hydrometer

Dr. H. Geissler, Nachfolger Franz Müller
1890-1920
glass hydrometer

glass hydrometer

German
1902-1914
glass hydrometer

glass hydrometer

German
1902-1914
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The Collection of Historical Scientific Instruments
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