Protractor Signed by Cox
date: label: date made
content: ca 1840
name: label: maker
content: Cox, William Charles
notes: label: Description
content: This semicircular brass protractor is graduated to half-degrees. It is marked by tens from 10° to 170° in both directions, from left to right and from right to left. A brass rectangle with a curved notch has been soldered on at the origin point. The rectangle contains a small hole for locating the vertex of the angle being measured. The base of the protractor bears the maker's mark: W. C. Cox, Devonport. The letters DB are scratched near the maker's mark.
label: Description
content: William Charles Cox, a British instrument maker who worked in Plymouth and Devonport, had his shop in Devonport from 1830 to 1851. He presumably made this protractor during that period. The Smithsonian purchased this instrument in 1959 from the estate of Henry Russell Wray via an auction conducted by Maggs Bros. Ltd. of London.
label: Description
content: Reference: Gloria Clifton, <I>Directory of British Scientific Instrument Makers 1550-1851</I> (London: National Maritime Museum, 1995), 69–70.
label: Description
content: Reference:
label: Description
content: Sotheby & Company, Catalogue of a Collection of Scientific Instruments, the Property of the Late Henry Russel Wray, London, 1959 (a copy of the catalogue is in the accession file).
label: Location
content: Currently not on view
place: label: place made
content: United Kingdom: England, Devonport
topic: label: Subject
content: Mathematics
label: Subject
content: Protractor
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Science & Mathematics
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content: Protractors
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.316927
label: accession number
content: 228694
label: catalog number
content: 316927
objectType: label: Object Name
content: protractor
physicalDescription: label: Physical Description
content: brass (overall material)
label: Measurements
content: overall: .2 cm x 22.5 cm x 11.8 cm; 3/32 in x 8 27/32 in x 4 21/32 in