Gerhardt Thermometer

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Description
This mercury-in-glass thermometer has a cylindrical bulb. The milk-white back is marked “Centigrade C. Gerhardt, Bonn No. 1940.” The scale extends from -38 to +20 degrees Centigrade. The thermometer is held in a hinged, black paper case.
Carl Gerhardt began making laboratory apparatus in 1872. This thermometer may date from soon after the establishment of the Johns Hopkins University in 1876.
Location
Currently not on view
date made
ca 1876
maker
C. Gerhardt
place made
Deutschland: North Rhine-Westphalia, Bonn
Measurements
overall: 6 3/4 in; 17.145 cm
overall in case: 5/8 in x 7 3/4 in x 7/8 in; 1.5875 cm x 19.685 cm x 2.2225 cm
ID Number
CH.315873
catalog number
315873
accession number
221777
Credit Line
Johns Hopkins University
subject
Chemistry
See more items in
Medicine and Science: Chemistry
Measuring & Mapping
Thermometers and Hygrometers
Data Source
National Museum of American History, Kenneth E. Behring Center

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