Octant
date: label: date made
content: 1784
name: label: maker
content: Ripley, Thomas
notes: label: Description
content: Octant with a rosewood frame, flat brass index arm, and ivory name plate. The ivory scale is graduated every 20 minutes from -5° to +95° and read by vernier to 2 minutes of arc. The inscription reads "Made by Thos Ripley London For Frans Earle July 21st 1784." Thomas Ripley was in business from 1765 to 1790, offering mathematical and optical instruments. Caroline Bates, the widow of Major General Alfred Elliott Bates, gave this to the Smithsonian in 1916.
label: Description
content: Ref: Gloria Clifton, <i>Directory of British Scientific Instrument Makers 1550-1851</i> (London, 1895), p.233.
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: Caroline E. Bates
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.290534
label: catalog number
content: 290534
label: accession number
content: 59652
objectType: label: Object Name
content: Octant
label: Other Terms
content: Maritime; Navigation
physicalDescription: label: Physical Description
content: wood (case material)
label: Measurements
content: overall in case: 4 5/16 in x 14 1/2 in x 17 1/8 in; 10.95375 cm x 36.83 cm x 43.4975 cm