Heliostat
date: label: date made
content: early 20th century
name: label: maker
content: Gaertner Scientific Corporation
notes: label: Description
content: A heliostat throws sunlight where it might be used for photography or scientific observations. This example is based on the form devised by Leon Foucault in 1862. It has a rectangular mirror measuring 10 x 5 inches (25 x 12.5 cm), a latitude arc, a declination arc, a clock drive, and a heavy tripod with leveling screws. The “WM. GAERTNER & CO. / MAKERS / CHICAGO” signature refers to a firm that was established in 1896, that worked closely with physicists and other scientists at the University of Chicago, and that became The Gaertner Scientific Corp. in 1923. The “R. L. 1565” mark on one leg screw refers to the Ryerson Laboratory at the University of Chicago.
label: Location
content: Currently not on view
place: label: place made
content: United States: Illinois, Chicago
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
label: See more items in
content: Optics
creditLine: label: Credit Line
content: University of Chicago
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.336607
label: accession number
content: 1978.0798
label: catalog number
content: 336607
objectType: label: Object Name
content: heliostat
physicalDescription: label: Measurements
content: overall: 18 in x 9 in x 15 in; 45.72 cm x 22.86 cm x 38.1 cm
label: Measurements
content: overall: 13 in x 8 1/2 in x 19 1/8 in; 33.02 cm x 21.59 cm x 48.5775 cm