- Brief Description
- A large format rectangular protractor of the first half of the 18th century. It has been attributed to the notable London maker Thomas Heath on the basis of the other instruments which it accompanied when acquired.
- Item type
- Object
- Makers
- Thomas Heath
- Provenance
- Presented by Howard Dawes.
- Object type
- Protractor
- Dimensions
- Height: 2mm Width: 305mm Depth: 73mm
- Inventory No
- 18805.1.6
Description
Brass rectangle whose upper face has bevelled edges, with a protracting scale [0] - 180 divided to 5, 1 and ½° and numbered by 10, running in both directions. The raised portion is blank and surrounded by a band of leaf decoration.
The reverse carries an 11" diagonal scale, dividing an inch and a half inch into 100 equal parts. Separated by a band of leaf decoration are scales of equal parts 10, 15, 20, 25, 30, 35, 40, 45, 50 combined with two scales of chords C [0] - 90 to different radii.
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More related items
Plotting Scale and Protractor, by Edmund Culpeper, London, c. 1700Inventory Number 44129
Plotting Scale and Protractor, by Edward Nairne, London, c. 1790Inventory Number 46151
Plotting Scale and Protractor, by William Collier, London, c. 1720Inventory Number 36421- Rectangular Protractor, by Thomas Heath?, London, c.1730Inventory Number 118805.1.7