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Roof artificial horizon
A rectangular wooden trough and a brass-framed roof-shaped cover. Two sides of the cover have clear glass panels, at an angle of 90 degrees. Accompanying the instrument is a circular wooden jar with a threaded stopper and an ivory spout. It is used for storing the mercury when the instrument is not in use.
The artificial horizon is contained in a fitted rectangular wooden box, with an inlaid brass plate on the lid inscribed ‘Presented by Greenwich Hospital to Thomas Crockford’. The box contains a trade label for G. Whitbread, 2 Grenada Terrace, London.
The artificial horizon is contained in a fitted rectangular wooden box, with an inlaid brass plate on the lid inscribed ‘Presented by Greenwich Hospital to Thomas Crockford’. The box contains a trade label for G. Whitbread, 2 Grenada Terrace, London.
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Object Details
| ID: | NAV0004 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Artificial Mercurial Horizon |
| Display location: | Not on display |
| Creator: | Whitbread, George |
| Date made: | circa 1850 |
| People: | Crockford, Thomas |
| Credit: | National Maritime Museum, Greenwich, London |
| Measurements: | Overall: 119 x 180 x 140 mm |
| Parts: | Roof artificial horizon |