Heliostat Mirror
date: label: date made
content: 1874
name: label: maker
content: Alvan Clark & Sons
notes: label: Description
content: Round glass mirror, 7 inches in diameter, made by Alvan Clark & Sons for use during the transit of Venus of 1874.
label: Description
content: Ref: Simon Newcomb, ed., <i>Observations on the Transit of Venus, Dec. 8-9, 1874</i> (Washington, D.C., 1880), pp. 15, 25-30, and 61-65.
label: Location
content: Currently not on view
place: label: place made
content: United States: Massachusetts, Cambridgeport
topic: label: Subject
content: Science & Scientific Instruments
setName: label: See more items in
content: Medicine and Science: Physical Sciences
creditLine: label: Credit Line
content: United States Naval Observatory
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.327709
label: catalog number
content: 327709
label: accession number
content: 283654
objectType: label: Object Name
content: Mirror
physicalDescription: label: Measurements
content: overall with mirror: 16 in x 14 1/2 in x 20 1/2 in; 40.64 cm x 36.83 cm x 52.07 cm
label: Measurements
content: case: 2 1/2 in x 9 in x 9 in; 6.35 cm x 22.86 cm x 22.86 cm
label: Measurements
content: overall: cr7155: 15 in x 61 in x 24 in; 38.1 cm x 154.94 cm x 60.96 cm
label: Measurements
content: overall: 3 in x 9 in x 9 in; 7.62 cm x 22.86 cm x 22.86 cm