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circumferentor (ipodimeter') with eccentric alidade, Italian, 17th century'
Science Museum Group
© The Board of Trustees of the Science Museum
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.
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Data in the title, made, maker and details fields are released under Creative Commons Zero
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