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Trigonometer Slide Rule
Slide rule made of boxwood, with a celluloid covering and a metal cursor with cellulose-based plastic window. The slide rule has two scales, one marked for distance (from 4000 to 20000), the other for angle. It is used to solve oblique-angled triangles for air navigation work.
This is one of a number of items formerly belonging to Henry Theodore Augustus Bosanquet (1870-1959), who was a leading figure in the development of air navigation in Britain during the First World War. The trigonometer slide rule was one of the instruments Bosanquet recommended for air navigation described in the 'Royal Naval Air Service Kite Balloon Training Manual' (1917).
This is one of a number of items formerly belonging to Henry Theodore Augustus Bosanquet (1870-1959), who was a leading figure in the development of air navigation in Britain during the First World War. The trigonometer slide rule was one of the instruments Bosanquet recommended for air navigation described in the 'Royal Naval Air Service Kite Balloon Training Manual' (1917).
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Object Details
| ID: | ZBA4457 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Trigonometer Slide Rule |
| Display location: | Not on display |
| Creator: | Unknown |
| Date made: | circa 1917 |
| Credit: | National Maritime Museum, Greenwich, London, Bosanquet Collection |
| Measurements: | Overall: 20 mm x 341 mm x 55 mm |