Bimetallic Pocket Thermometer

This lovely bibelot, which probably dates from the 19th century, has a silvered case like a pocket watch. Several concentric scales on the white porcelain face show the temperature according to various scales. The one marked "REAU" refers to René Antoine Ferchault de Réaumur, a French scientist who, in 1730, proposed a temperature scale according to which water froze at 0 degrees and boiled at 80 degrees. The one marked "FAHR" refers to Daniel Gabriel Fahrenheit, a Polish scientist who in 1724 propsed a temperature scale according to which water froze at 32 degrees and boiled at 212 degrees.
Currently not on view
Object Name
bimetallic pocket thermometer
overall: 2 in; 5.08 cm
ID Number
catalog number
accession number
Measuring & Mapping
Thermometers and Hygrometers
See more items in
Medicine and Science: Physical Sciences
Thermometers and Hygrometers
Data Source
National Museum of American History, Kenneth E. Behring Center

Visitor Comments

Add a comment about this object

**Please read before submitting the form**

Have a comment or question about this object to share with the community? Please use the form below. Selected comments will appear on this page and may receive a museum response (but we can't promise). Please note that we generally cannot answer questions about the history, rarity, or value of your personal artifacts.

Have a question about anything else, or would you prefer a personal response? Please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Enter the characters shown in the image.