Parallel rule
The parallel rule was designed to assist in drawing parallel lines accurately. For navigators, this is important in laying off a specific course on a chart and parallel rules are still used today. This example is made of brass and is contained in a wooden box with a sliding lid. The maker’s name is inscribed on the top of the rule as ‘CRICHTON LONDON’, which appears either side of the mark of the East India Company.
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Object Details
ID: | NAV0616 |
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Collection: | Astronomical and navigational instruments |
Type: | Parallel rule |
Display location: | Not on display |
Creator: | Crichton |
Date made: | circa 1820 |
Credit: | National Maritime Museum, Greenwich, London |
Measurements: | Overall: 15 mm x 611 mm x 73 mm |
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