Sector and protractor

This sector and protractor were part of a set of brass drawing instruments made around 1740, probably by George Hearne, a scientific instrument maker based in London.

The sector has a foliate design to the hinge and trigonometrical scales. This side of the rectangular protractor has plotting scales, used in conjunction with dividers for very precise measurements.

Hearne made large reflecting telescopes, having been instructed by the scientist John Hadley (1682-1744), the astronomer John Bradley (1693-1762) and Samuel Molyneux (1687-1728), who between them revived the reflecting telescope in the 18th century.

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Online ID:	000-190-001-075-C
Image Rights Holder:	National Museums Scotland
Project:	0098: National Museums Scotland Project description \| View all records in project
Ref:	National Museums Scotland T.1985.76
Date:	Around 1740 c. 1740
Material:
Dimensions:
What:	Drawing instrument
Subject:
Who:	G. Hearne (Possibly the maker) George Hearne, London (Maker)
Where:	England, London
Event:
Description:	Drawing instruments by George Hearne, London, c. 1740
References:	Hambly, Maya, Drawing Instruments 1580-1980. London: Sotheby's, 1988, pp 176-7
Translations:
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