Spectroscope
date: label: date made
content: early 20th century
name: label: maker
content: Central Scientific Company
notes: label: Description
content: Direct vision spectroscope inscribed “WALLACE / SPECTROSCOPE / CENTRAL SCIENTIFIC CO. / CHICAGO.” Instead of a prism assembly, this instrument has a replica diffraction grating of the sort developed by Robert James Wallace (1868-1945), a photographer at the Yerkes Observatory in Williams Bay, Wisconsin.
label: Description
content: Ref: Robert J. Wallace, “Diffraction Grating Replicas,” <i>Astrophysical Journal</i> 22 (1905): 123-130, and 23 (1906): 96-99.
label: Description
content: Central Scientific Company, <i>Physical and Chemical Apparatus</i> (Chicago, 1909), p. 234.
label: Description
content: "DR. ROBERT J. WALLACE," New York Times (Dec. 13, 1945), p. 27.
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
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.337125
label: catalog number
content: 337125
label: accession number
content: 1979.0026
objectType: label: Object Name
content: spectroscope
physicalDescription: label: Measurements
content: overall: 4 in; 10.16 cm
label: Measurements
content: overall in housing: 3 11/16 in x 3 1/4 in x 6 7/16 in; 9.36625 cm x 8.255 cm x 16.35125 cm