Edson's Hygrodeik
date: label: date made
content: ca 1866-1895
name: label: maker
content: Lowe, Nathaniel M.
notes: label: Description
content: William Edson, a civil engineer in Boston, designed a "Hygrometrical Index" that, when connected to a common wet and dry bulb hydrometer, "will enable any one, by simple inspection of the instrument, to ascertain the relative humidity and dew-point of the air, also the absolute amount of moisture in the air, without the aid of tables or calculation." In this example, which came from Cornell College, the paper chart is marked "EDSON'S HYGRODEIK MANUFACTURED BY N.M. LOWE, BOSTON." Nathaniel M. Lowe is known to have manufactured Edson's Hygrodeik from 1866 until the early 1890s.
label: Description
content: Ref: William Edson, "Hydrometer," U.S. Patent 48620 (1865), as well as similar patents in England and France.
label: Description
content: William Edson, <i>The Use of Edson's Hygrodeik</i> (1865).
label: Location
content: Currently not on view
place: label: place made
content: United States: Massachusetts, Boston
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: Cornell College
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.329004
label: catalog number
content: 329004
label: accession number
content: 278100
objectType: label: Object Name
content: psychrometer
physicalDescription: label: Measurements
content: overall: 13 in x 8 1/2 in x 3 1/8 in; 33.02 cm x 21.59 cm x 7.9375 cm
label: Measurements
content: part: 3/4 in x 8 1/2 in x 3 1/4 in; 1.905 cm x 21.59 cm x 8.255 cm
label: Measurements
content: overall: 13 in x 8 1/2 in x 3 1/8 in; 33.02 cm x 21.59 cm x 7.9375 cm