Octant
name: label: maker
content: Harris & Co.
notes: label: Description
content: Octant with an ebony frame, flat brass index arm, and ivory scale and name plate. The scale is graduated every 20 minutes from -3° to +99° and read by vernier with top-mounted tangent screw to single minutes of arc. The inscription reads "HARRIS & Co Holborn London." This octant probably dates from the first half of the 19th century when there were several men of this name working at this address, making and marketing mathematical and optical instruments.
label: Description
content: Ref: Gloria Clifton, <i>Directory of British Scientific Instrument Makers 1550-1851</i> (London, 1995), pp. 124-126.
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
label: See more items in
content: Measuring & Mapping
creditLine: label: Credit Line
content: Bowdoin College
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.329726
label: catalog number
content: 329726
label: accession number
content: 278336
objectType: label: Object Name
content: octant
physicalDescription: label: Physical Description
content: ebony (frame material)
label: Physical Description
content: ivory (overall material)
label: Physical Description
content: brass (overall material)
label: Measurements
content: overall: 11 1/2 in x 9 1/2 in x 3 in; 29.21 cm x 24.13 cm x 7.62 cm
label: Measurements
content: overall in case: 4 3/4 in x 11 5/8 in x 13 1/4 in; 12.065 cm x 29.5275 cm x 33.655 cm