Gilbert & Sons Box Sextant

Description
This has a silvered scale that is graduated every 30 minutes from -3° to +148° and read by vernier with swinging magnifier to single minutes of arc. The "Gilbert & Sons, London" inscription above the magnifier refers to a Navigation Warehouse in London that flourished from 1806 to 1819.
Location
Currently not on view
Object Name
box sextant
date made
early 19th century
maker
Gilbert and Sons
Measurements
overall: 2 3/4 in; 6.985 cm
place made
United Kingdom: England, London
ID Number
PH*318442
accession number
234476
catalog number
318442
subject
Measuring & Mapping
Navigation
See more items in
Medicine and Science: Physical Sciences
Navigation
Data Source
National Museum of American History, Kenneth E. Behring Center
Additional Media

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