Artificial glass horizon in square fitted mahogany case with funnel and instructions, made by unknown English maker, 1805-1815. Consisting of a circular brass container with three levelling feet, which holds spirit, covered by a transparent glass plate. When in use, the vessel is filled with spirit using a detachable funnel, leaving an air-gap under the glass to act as a bubble level, which is centred with levelling screws. The funnel is also used to replacing the spirit and for release of pressure when the liquid expands due to heat.
- Object Number:
- furnishing and equipment
- tools & equipment
- optical instrument
- ancillary optical instrument
- artificial horizon
- Mr Thomas H. Court
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