Hygrograph

Hygrograph

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Description
A hydgrograph records humidity as it varies over time. This example, which came to the Smithsonian in 1923, is marked "JULIEN P. FRIEZ & SONS, BELFORT METEOROLOGICAL OBSERVATORY, 1230 E. BALTIMORE STREET, BALTIMORE, M.D., U.S.A." and "HYGROGRAPH, Type ML 16, SERIAL 74865, SIGNAL CORPS, U.S. ARMY, ORDER 110418 DATE 2.8.23." The firm began trading under this name in 1914.
Location
Currently not on view
Object Name
Hygrograph
date made
1914-1923
maker
Friez, Julien P.
Julien P. Friez & Sons
place made
United States: Maryland, Baltimore
Measurements
overall: 7 3/8 in x 11 5/8 in x 9 1/2 in; 18.7325 cm x 29.5275 cm x 24.13 cm
ID Number
PH.308178.1
accession number
70852
catalog number
308178.1
Credit Line
U.S. Signal Corps
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Military
Thermometers and Hygrometers
Data Source
National Museum of American History
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