Hydrometer
Hydrometer
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- Description
- Glass hydrometer with mercury ballast, and paper label marked “Pat. Appl'd For PER CENT OF PROOF SPIRITS TP. 60° F. AMERICAN INSTRUMENT CO. WASHINGTON, D.C.” and in red ink “2631” and “1935.”
- Ref: George K. Porter, “Hydrometer,” U.S. Patent 2,195,339 (March 26, 1940), assigned to American Instrument Co.
- Location
- Currently not on view
- Object Name
- hydrometer
- maker
- American Instrument Company
- place made
- United States: District of Columbia, Washington
- Measurements
- overall: 10 in x 1 in; 25.4 cm x 2.54 cm
- overall: 10 in x 1 1/8 in; 25.4 cm x 2.8575 cm
- ID Number
- PH.327005
- catalog number
- 327005
- accession number
- 267815
- See more items in
- Medicine and Science: Physical Sciences
- Data Source
- National Museum of American History
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