Albert Piche, in Paris, described this simple instrument in 1872, and the Signal Service was soon using evaporimeters to determine the rate of evaporation in different parts of the United States. An account from 1888 mentions "an inverted graduated test-tube filled with water, its mouth closed by a disk of filter paper held by a spring." In this example, the evaporimeter (probably an improved version designed by Charles F. Marvin of the U.S. Weather Bureau) is enclosed in a copper box on iron legs.

An evaporimeter is also known as an atmometer.

Ref.: "Exhibition of the New England Meteorological Society," American Meteorological Journal 5 (1888): 443.

"Improved Piche Evaporimeter," in H. J. Green, Scientific Instruments. Catalog C (Brooklyn, n.d.), p.15.

Location: Currently not on view

Subject: U.S. Weather Bureau


See more items in: Medicine and Science: Physical Sciences, Thermometers and Hygrometers, Measuring & Mapping


Exhibition Location:

Credit Line: U.S. Weather Bureau

Data Source: National Museum of American History

Id Number: PH.316818Catalog Number: 316818Accession Number: 228768

Object Name: evaporimeter

Measurements: overall: 16 7/8 in x 9 1/4 in x 9 1/8 in; 42.8625 cm x 23.495 cm x 23.1775 cm

Guid: http://n2t.net/ark:/65665/ng49ca746aa-0627-704b-e053-15f76fa0b4fa

Record Id: nmah_1167595

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