Mercury-in-glass thermometer with a cylindrical bulb, and scale that extends from -38 to +20 degrees Centigrade. The inscription on the milk-white back reads “Centigrade C. Gerhardt, Bonn No. 1940.” There is a hinged, black paper case.

Carl Gerhardt began making laboratory apparatus in 1872. This thermometer was used by chemists at the Johns Hopkins University, and may date from soon after the establishment of that school in 1876.

Date Made: ca 1876

Maker: C. Gerhardt

Location: Currently not on view

Place Made: Germany: North Rhine-Westphalia, Bonn

Subject: Chemistry


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


Exhibition Location:

Credit Line: Johns Hopkins University

Data Source: National Museum of American History

Id Number: CH.315873Catalog Number: 315873Accession Number: 221777

Object Name: Thermometer

Measurements: overall: 6 3/4 in; 17.145 cmoverall 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


Record Id: nmah_1421351

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