Hydrometer

Hydrometer

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Description
Glass hydrometer with shot ballast, paper label marked “Actinometer 60° F.” and glass jar. An actinometer measures the intensity of radiation. In this form, designed for use by photographers, the scale indicates the number of grains of silver nitrate to an ounce of water at a particular light level.
Location
Currently not on view
Object Name
Hydrometer
Associated Place
United States: New Jersey
Physical Description
glass (overall material)
wood (overall material)
Measurements
overall: 14.6 cm; 5 3/4 in
overall in case: 7 1/2 in x 2 in; 19.05 cm x 5.08 cm
ID Number
1991.0691.45
accession number
1991.0691
catalog number
1991.0691.45
Credit Line
June W. Leonard
See more items in
Medicine and Science: Chemistry
Data Source
National Museum of American History
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