Norie Octant

This octant has an ebony frame, reinforced brass index arm, and ivory name plate. The ivory scale is graduated every 20 minutes from -3° to +100° and read by vernier with tangent screw to single minutes of arc. There is also a back sight and a back horizon glass that could be used to measure angles greater than 90°. The "NORIE LONDON" inscription refers to John William Norie, proprietor of a Navigation Warehouse in London from 1799. The firm traded as Norie & Co. from 1816-1839.
Ref: Gloria Clifton, Directory of British Scientific Instrument Makers 1550-1851 (London, 1895), p. 201.
Object Name
date made
ca 1800
Physical Description
ebony (overall material)
brass (overall material)
overall: 12 in x 10 in x 3 1/2 in; 30.48 cm x 25.4 cm x 8.89 cm
place made
United Kingdom: England, London
ID Number
catalog number
accession number
Sailing Ships
Measuring & Mapping
See more items in
Medicine and Science: Physical Sciences
Norie Atlas
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Edward Corcoran

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