Italian off-set circumferentor, 1601-1700

Made:
1601-1700 in Italy
maker:
Unknown

Circumferentor ("ipodimeter") with eccentric alidade, Italian, 17th century

The inner scale on the circle of this circumferentor is engraved; 'Aqvilo solanvs evrvs avster africvs favonivs chavrvs septent'. Circumferentors (with a full circle scale) and graphometers (with a half circle scale) were widely used through the 17th and 18th centuries for angle measurement. A joint on the support allowed for both vertical and horizontal use. The sights on this instrument are set off to one side.

Details

Category:
Surveying
Object Number:
1908-122
Materials:
brass, glass, iron, needle
type:
circumferentor
taxonomy:
  • furnishing and equipment
  • measuring device - instrument
  • magnetic compass
credit:
Middleton, E.C.
status:
Permanent collection

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