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Date: |
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Description: | 25
77
J.WHITE GLASGOW SIR W. THOMSON'S PATENT No 886
At one end of this instrument there is a counter-balance and a circular spirit level at one end. At the centre is a spring clip and pin. At the front end the tube holds the magnifier at the top along with two shades and an adjustable prism. There is a bracket and hole at the centre for a shadow pin (missing).
A
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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