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

See more items in: Medicine and Science: Chemistry


Exhibition Location:

Credit Line: June W. Leonard

Data Source: National Museum of American History

Id Number: 1991.0691.45Accession Number: 1991.0691Catalog Number: 1991.0691.45

Object Name: Hydrometer

Physical Description: glass (overall material)wood (overall material)Measurements: overall: 14.6 cm; 5 3/4 inoverall in case: 7 1/2 in x 2 in; 19.05 cm x 5.08 cm

Guid: http://n2t.net/ark:/65665/ng49ca746a1-35c0-704b-e053-15f76fa0b4fa

Record Id: nmah_332519

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