Hair Hygrometer
date: label: date made
content: after 1908
name: label: maker
content: H. J. Green
notes: label: Description
content: Charles F. Marvin, a meteorologist who spent his career with the Army Signal Corps and its successor, the U.S. Weather Bureau, introduced this type of hygrometer in 1908. Unlike the original described by Horace Benedict de Saussure, of Geneva, in 1783, the Marvin instrument had two bundles of hair. The inscription on this example reads “PERCENTAGE OF SATURATION / (RELATIVE HUMIDITY) / HAIR HYGROMETER / No. 19 / U.S. WEATHER BUREAU / HENRY J. GREEN / B’KLYN, N.Y.”
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, Brooklyn
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Measuring & Mapping
creditLine: label: Credit Line
content: United States Weather Bureau
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.314528
label: catalog number
content: 314528
label: accession number
content: 204612
objectType: label: Object Name
content: hygrometer
physicalDescription: label: Measurements
content: overall: 7 3/4 in x 6 in; 19.685 cm x 15.24 cm