Gunter quadrant

Made:
1640

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Brass Gunter quadrant (3-inch radius) signed J M and dated 1640 with degree and trigonometric scales and vovelle
Science Museum Group
© The Board of Trustees of the Science Museum, London

Brass Gunter quadrant (3-inch radius) signed J M and dated 1640 with degree and trigonometric scales and vovelle
Science Museum Group
© The Board of Trustees of the Science Museum, London

Gunter quadrant, maker unknown, probably made in London, 1640. Signed ‘JM 1640’.

Gunter quadrants are mathematical instruments that were used for basic astronomical calculation and time-telling. This quadrant has a scale for measuring altitude in degrees and Gunter’s trignonometric scale for making calculations. There is a volvelle on the reverse consisting of a planispheric nocturnal.

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Details

Category:
Astronomy
Object Number:
1938-385
type:
gunter quadrant
taxonomy:
  • furnishing and equipment
  • measuring device - instrument
  • timepiece
  • horary quadrant
  • furnishing and equipment
  • measuring device - instrument
  • timepiece
credit:
Mr W.E. Miller

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