Recording Thermometer
name: label: maker
content: Negretti & Zambra
notes: label: Description
content: Negretti & Zambra introduced this type of instrument in 1874. The stem is U-shaped, with a small U-shaped bend just above the cylindrical bulb. In use, the thermometer would be hung with the bulb down. Rotating it one full turn causes the mercury in the first half of the tube to flow into the second half, thereby recording the temperature at that moment. In use, it might be connected to a clock that would rotate it at a scheduled time.
label: Description
content: In this example, the mercury-in-glass thermometer is mounted on an ebony plate marked "NEGRETTI & ZAMBRA LONDON" and "RECORDING THERMOMETER." A white porcelain strip on the plate is marked "NEGRETTI & ZAMBRA'S PATENT" and graduated every 5 degrees Fahrenheit from 0 to 120; a second graduation runs from 20 to +120. The back of the stem is milk white. The front, on the side nearer the bulb, is marked "PATENT No. 28" and graduated (but not numbered) every degree Fahrenheit from 0 to +120; the other side is graduated (but not numbered) every degree from +15 to +120.
label: Description
content: Ref.: Negretti and Zambra, <i>Encyclopaedic Illustrated and Descriptive Reference Catalogue</i> (London, after 1878), pp. 101-103.
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
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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.317478
label: accession number
content: 230396
label: catalog number
content: 317478
objectType: label: Object Name
content: recording thermometer
label: Object Name
content: thermometer
physicalDescription: label: Measurements
content: overall: 10 1/8 in x 1 3/8 in x 1 1/4 in; 25.7175 cm x 3.4925 cm x 3.175 cm