Sextant
date: label: date made
content: ca 1942
name: label: dealer
content: Kelvin & Wilfrid O. White
label: maker
content: David Shackman & Sons
notes: label: Description
content: Like the "Mate" sextant made by Henry Hughes & Son, Ltd., of London, this one has a blackened brass frame, and a brass scale that is graduated every degree from -5° to +135° and read by drum micrometer to 30 minutes of arc. It was examined at the National Physical Laboratory at Teddington, England, in 1942.
label: Description
content: The inscription reads "MADE IN ENGLAND FOR KELVIN & WILFRID O. WHITE Co. BOSTON & NEW YORK" and "PATENT APPLIED FOR" and "1775" and "DS&S." The DS&S insignia refers to David Shackman & Sons, the British firm that actually made this sextant. The referenced patent (GB556034), issued to Albert Shackman and Reuben Cyril Shackman in September 1943, describes details of the drum micrometer.
label: Description
content: Ref: Kelvin & Wilfrid O. White Co., <i>Nautical Instruments</i> (Boston, 1940), p. 31.
label: Description
content: Henry Hughes & Son, Ltd., <i>Husun Navigational Instruments</i> (London, 1939), p. 31.
label: Description
content: M. V. Brewington, <i>The Peabody Museum Collection of Navigating Instruments</i> (Salem, 1963), p. 132.
label: Location
content: Currently not on view
place: label: place made
content: United Kingdom: England
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Navigation
label: See more items in
content: Measuring & Mapping
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.337006
label: catalog number
content: 337006
label: accession number
content: 1978.2282
objectType: label: Object Name
content: sextant
physicalDescription: label: Measurements
content: case: 5 1/4 in x 11 in x 11 in; 13.335 cm x 27.94 cm x 27.94 cm
label: Measurements
content: overall in case: 5 3/8 in x 10 7/8 in x 11 1/8 in; 13.6525 cm x 27.6225 cm x 28.2575 cm