Hair Hygrograph

Hair Hygrograph

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Description
A hygrograph recordd variation in atmospheric humidity. This example is marked "JULIEN P. FRIEZ & SONS, BELFORT METEOROLOGICAL OBSERVATORY, 1230 E. BALTIMORE STREET, BALTIMORE, M.D., U.S.A." and "HYDROGRAPH, TYPE ML 16, SERIAL 74865, SIGNAL CORPS, U.S. ARMY, ORDER 110418, DATE 2/8/23." It was made between 1914 when the firm began trading under this name, and 1923, when it came to the Smithsonian. The cover is missing.
Location
Currently not on view
Object Name
Hygrograph
maker
Julien P. Friez & Sons
place made
United States: Maryland, Baltimore
Measurements
overall: 6 3/8 in x 12 in x 9 3/8 in; 16.1925 cm x 30.48 cm x 23.8125 cm
ID Number
PH.308178.2
catalog number
308178.2
accession number
70852
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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