Hygrometer
date: label: date made
content: after 1881
notes: label: Description
content: The inscription on the face of this circular metal hygrometer—“Made in Germany / D.R. P. No. 16568 / Hygrometer”—refers to the German patent issued to Otto Mithoff, an engineer in Berlin, in 1881. Other inscriptions read "Outdoor Fluctuations" and "Indoor Fluctuations" and there is a scale running from Full Saturation to Absolutely Dry. This English wording suggests that this example was designed for sale in England or the United States.
label: Description
content: Ref: Otto Mithoff, “Hygroskop aus der Inneren Haut der Eierschlen hergestellt,” German Patent 16568 (March 18, 1881).
label: Description
content: “Hygroskop von O. Mithoff in Berlin,” <i>Dingler’s polytechnische Journal</i> 245 (1882): 452.
label: Location
content: Currently not on view
place: label: place made
content: Germany
topic: label: Subject
content: Science & Scientific Instruments
setName: label: See more items in
content: Medicine and Science: Physical Sciences
creditLine: label: Credit Line
content: U.S. Military Academy
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.315735
label: accession number
content: 217544
label: catalog number
content: 315735
objectType: label: Object Name
content: hygrometer
physicalDescription: label: Measurements
content: overall: 3 13/32 in; 8.636 cm
label: Measurements
content: overall: 1 3/4 in x 3 3/8 in; 4.445 cm x 8.5725 cm