Octant
date: label: date made
content: ca 1800
name: label: maker
content: Spencer Browning & Rust
notes: label: Description
content: Octant with an ebony frame and flat brass index arm. The ivory scale is graduated every 20 minutes from -2° to +99° 40' and read by vernier with tangent screw to single minutes of arc. There is also a back sight and a back horizon glass that can be used to measure angles greater than 90°. The "Spencer Browning & Rust London" and "SBR" inscriptions refer to a firm that was in business from 1784 to 1840.
label: Location
content: Currently not on view
place: label: place made
content: United Kingdom: England, London
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Navigation
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content: Measuring & Mapping
creditLine: label: Credit Line
content: Mount St. Mary's College
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.326111
label: catalog number
content: 326111
label: accession number
content: 257245
objectType: label: Object Name
content: octant
physicalDescription: label: Physical Description
content: ebony (overall material)
label: Physical Description
content: brass (overall material)
label: Physical Description
content: ivory (overall material)
label: Measurements
content: box: 12 cm x 43.2 cm x 37.5 cm; 4 23/32 in x 17 in x 14 3/4 in
label: Measurements
content: octant radius: 13 3/4 in; 34.925 cm
label: Measurements
content: overall in box: 4 3/4 in x 14 1/2 in x 16 5/8 in; 12.065 cm x 36.83 cm x 42.2275 cm