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Black glass artificial horizon
An artificial horizon was designed to be used with a sextant in situations where a natural horizon was not visible; for instance, when the sextant was being used on land.
A circular brass case on three levelling feet covered with a blackened glass plate serving as mirror. The artificial horizon is contained in a fitted triangular sharkskin case containing a spirit level in a cylindrical wooden container. There is also a trade label for John Lilley and Son, 9 London Street and Fenchurch Street, London (1870-85), and a handwritten label, ‘E. Comp. 5th Batt. Essex Regt. Hon. Members 2nd Prize won by E.T. Adams. 1909’.
A circular brass case on three levelling feet covered with a blackened glass plate serving as mirror. The artificial horizon is contained in a fitted triangular sharkskin case containing a spirit level in a cylindrical wooden container. There is also a trade label for John Lilley and Son, 9 London Street and Fenchurch Street, London (1870-85), and a handwritten label, ‘E. Comp. 5th Batt. Essex Regt. Hon. Members 2nd Prize won by E.T. Adams. 1909’.
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Object Details
| ID: | NAV0015 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Artificial glass horizon |
| Display location: | Not on display |
| Creator: | Troughton & Simms |
| Date made: | circa 1830 |
| People: | John Lilley & Son Ltd |
| Credit: | National Maritime Museum, Greenwich, London, Adams Collection |
| Measurements: | Overall: 55 x 130 x 120 mm; Diameter: 90 mm |
| Parts: | Black glass artificial horizon |