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Date: |
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Description: | * WELLINGTON . LONDON *
Sector, made of ivory, with brass hinges and brass studs at key points to prevent damage when being used with a pair of dividers. The sector was a calculating instrument commonly used in navigation and surveying. The relatively late date of this example shows the persistence of such devices.
Scales on the front include: Inches (0-12); L (equal parts); S (secants); C (chords); POL (polygons).
Scales on the back include: S (sinnes); T (tangents); N (line of numbers).
On the edge is a linear scale marked 0-100.
caption: Record Shot - Do not reproduce. | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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