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Description: | A Thompson type and has counter balance and spirit level at one end. A cross strut holds the shadow pin at centre. A sloping tube houses a magnifier with wire in its lower end. At the upper end of the tube is a small adjustable prism and two semi-circular filters. There are four pegs on the bottom, one at each corner.
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caption: Record Shot - Do not reproduce. | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | azimuth mirrors Azimuth | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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