Negretti & Zambra Thermometer, Absolute Scale

Negretti & Zambra Thermometer, Absolute Scale

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Description
This is a sensitive precision instrument that was probably used as a standard for evaluating instruments sent to meteorological field stations. The mercury-in-glass thermometer is mounted on a white porcelain plate marked "NEGRETTI & ZAMBRA, SCIENTIFIC INSTRUMENT MAKERS, LONDON" and "ABSOLUTE" and "29" with the M/O monogram of the British Meteorological Office, the N/Z monogram of the firm, and the K/O monogram of the Kew Observatory.
The plate is graduated every 5 degrees from 245 to 325. The back of the stem is white enamel and marked "29" and with the M/O and N/Z monograms; the front is graduated every degree from +243 to +325 and numbered at 245, 273, and 320. It came to the Smithsonian from the U.S. Weather Bureau.
Location
Currently not on view
Object Name
thermometer
date made
early 20th century
maker
Negretti & Zambra
place made
United Kingdom: England, London
Measurements
overall: 11 in; 27.94 cm
overall: 11 1/8 in x 1 7/16 in x 1/2 in; 28.2575 cm x 3.65125 cm x 1.27 cm
ID Number
PH.314556
accession number
204612
catalog number
314556
Credit Line
U.S. Weather Bureau
subject
U.S. Weather Bureau
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Thermometers and Hygrometers
Data Source
National Museum of American History
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