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Roof artificial horizon
A rectangular cast-iron trough with a pouring hole at one corner, and a black-painted 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 polished steel mercury bottle with a threaded funnel-shaped cover and a threaded stopper. It is used for storing the mercury when the instrument is not in use.
The artificial horizon is contained in a fitted rectangular mahogany carrying box with a brass plate for securing the mercury bottle.
The artificial horizon is contained in a fitted rectangular mahogany carrying box with a brass plate for securing the mercury bottle.
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Object Details
| ID: | ACO1262 |
|---|---|
| Collection: | Astronomical and navigational instruments |
| Type: | Artificial Mercurial Horizon |
| Display location: | Not on display |
| Creator: | Crawford, Tyson |
| Date made: | ca.1900 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Parts: | Roof artificial horizon |
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