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Date: |
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Description: | 509 N
509
REGISTERED KELVIN BOTTOMLY & BAIRD LTD / CAPTAINN CHETWYND'S PATENT No. 25965/06 / GLASGOW & LONDON
Card for a liquid compass.
Card: A mica card attached to float by a wire complex. The card is white with black markings graduated to quarter points and quadrantally in degrees. The quadrantal markings are normal and inverted for use with a prism.
Needle: The two needles are enclosed inn tubes which are attached to the float.
length 3.8" (9.8 cm)
Pivot: The pivot is incorporated in the domed float and has a thumb screw at the top to facilitate changing the jewel.
O.A. height 2.25" 95.6 cm)
Inscription.
caption: Record Shot - Do not reproduce. | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | liquid compasses | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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