Dip Circle
name: label: maker
content: Froment
label: maker
content: Froment, Paul-Gustave
notes: label: Description
content: The "Froment a Paris" inscription on this dip circle refers to Paul Gustave Froment (1815-1865), an instrument maker who worked for Henri P. Gambey in Paris before opening his own shop in 1841. This dip circle resembles a Gambey instrument. The vertical circle is silvered and graduated to 10 minutes; the horizontal circle is silvered, graduated to 30 minutes, and read by vernier to single minutes. The U.S. Naval Observatory transferred it to the Smithsonian in 1966.
label: Description
content: Ref: Paolo Brenni, "Paul Gustave Froment," <i>Bulletin of the Scientific Instrument Society</i> 45 (1995): 19-24.
label: Location
content: Currently not on view
place: label: Place Made
content: France: Île-de-France, Paris
topic: label: Subject
content: Science & Scientific Instruments
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Science & Mathematics
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content: Measuring & Mapping
creditLine: label: Credit Line
content: U.S. Department of Defense, Dept. of the Navy, U.S. Naval Observatory
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.327705
label: accession number
content: 283654
label: catalog number
content: 327705
objectType: label: Object Name
content: dip circle
physicalDescription: label: Physical Description
content: metal (overall material)
label: Measurements
content: vertical circle: 10 in; x 25.4 cm
label: Measurements
content: horizontal circle: 7 in; 17.78 cm
label: Measurements
content: overall: 14 3/4 in x 12 13/16 in x 8 3/4 in; 37.465 cm x 32.54375 cm x 22.225 cm