Tonnelot Thermometer

Description
This mercury-in-glass thermometer has a cylindrical bulb, and a milk white tube that is marked “Yale Observatory Standard No. 51 Made by Tonnelot à Paris Equal graduations Crystal glass tube made April 1879.” The scale, which extends from -4.8 to +104.6 degrees Centigrade, is graduated every degree, in fifths. The protective chrome case is marked “Yale Observatory Standard No 51.” It came to the Smithsonian from the U.S. Weather Bureau.
Ref.: Leonard Waldo, “Examination of Thermometers at the Yale Observatory,” Popular Science Monthly 18 (1881): 367-374.
Location
Currently not on view
Object Name
thermometer
date made
1879
maker
Tonnelot, Jules
place made
France: Île-de-France, Paris
ID Number
PH*317451
catalog number
317451
accession number
230396
subject
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
Credit Line
U.S. Weather Bureau

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.

Image CAPTCHA
Enter the characters shown in the image.