Mirror
date: label: date made
content: around 1915
notes: label: Description
content: This mirror is made of stellite, a highly-reflective alloy of chromium, cobalt and tungsten that tends not to tarnish. Smithsonian scientists used it in conjunction with spectrobolometers, after having found that mirrors made of silvered glass or of speculum metal tended to tarnish. The mirror is octagonal (8 inches high x 5 inches wide) and held in a brass frame that can be adjusted for latitude; there are four round holes in the base. The stellite was furnished by the Haynes Stellite Co. in Kokomo, Indiana.
label: Description
content: Ref: <i>Annals of the Astrophysical Observatory of the Smithsonian Institution</i> 4 (1922): 86.
label: Location
content: Currently not on view
topic: label: Subject
content: Science & Scientific Instruments
setName: label: See more items in
content: Medicine and Science: Physical Sciences
creditLine: label: Credit Line
content: Smithsonian Astrophysical Observatory
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.314880
label: catalog number
content: 314880
label: accession number
content: 211531
objectType: label: Object Name
content: mirror
physicalDescription: label: Measurements
content: overall: 10 1/8 in x 7 in x 6 in; 25.7175 cm x 17.78 cm x 15.24 cm