Sector and protractor

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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.

Record details

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• Online ID: 000-190-001-075-C
• Image Rights Holder: National Museums Scotland
• Project: National Museums Scotland
  Project description   View all records in project
• Ref: National Museums Scotland  T.1985.76
• Date: Around 1740
  c. 1740
  
• Material: Drawing instrument
  
• 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:
• Related Records: