Artificial horizon in wooden case with accompanying letter, metal / glass / wood / paper, made by James A Sinclair & Co Ltd, 54 Haymarket, London, England, 1906, used by Sydney Observatory, Sydney, New South Wales, Australia An artificial horizon contained within a lockable wooden case with a hinged lid and brass carrying handle. The artificial horizon consists of a triangular shaped cover that is open at the base and has two panels of glass fixed in either side of its sloping top. The open base of the triangular cover, allows it to fit over the top of a rectangular cast iron tray that has been painted black. A cylindrical metal mercury bottle with two screw top lids, an outer lid and an inner lid and a letter relating to the instrument accompany the artificial horizon. Observatory stock number 230.
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(Accession num: H10027)
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