Minimum Thermometer
date: label: date made
content: after 1850
name: label: maker
content: Negretti & Zambra
notes: label: Description
content: Alcohol-in-glass Rutherford-type thermometer mounted on a white porcelain plate marked "NEGRETTI & ZAMBRA, SCIENTIFIC INST. MAKERS, LONDON" with the N/Z monogram of the firm, and "24" with the M/O monogram of the British Meteorological Office. This plate is graduated every 5 degrees Fahrenheit from -20 to +110. The stem is marked "24" and with the N/Z and M/O monograms; and is graduated (but not numbered) every degree F. from -21 to +112. The whole is mounted on a wooden base with metal guards for the bulb. There are also two metal loops so that it can be hung horizontally.
label: Description
content: Negretti & Zambra claimed that they were "the first to introduce into extensive use thermometer and barometer scale-plates made of porcelain, having the divisions and figures engraved thereon by means of fluoric acid, and permanently burnt-in and blackened so as always to present a clear legible scale" that would not be affected by sea water or by atmospheric conditions.
label: Description
content: Ref.: Negretti & Zambra, <i>A Treatise on Meteorological Instruments</i> (London, 1864), pp. 65 and 76.
label: Location
content: Currently not on view
place: label: place made
content: United Kingdom: England, London
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Thermometers and Hygrometers
label: See more items in
content: Measuring & Mapping
creditLine: label: Credit Line
content: U.S. Weather Bureau
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.317470
label: accession number
content: 230396
label: catalog number
content: 317470
objectType: label: Object Name
content: thermometer
physicalDescription: label: Measurements
content: overall: 11 11/32 in; 28.829 cm
label: Measurements
content: overall: 3 1/4 in x 13 5/8 in x 1 5/16 in; 8.255 cm x 34.6075 cm x 3.33375 cm