Small circumferentor with fixed and moveable sights, 1571-1600.

Small circumferentor with fixed and moveable sights, 1571-1600.
2 9 c m
40cm
actual image size: 32cm x 21cm

Description

The scale on this circumferentor is engraved on the circle '10(10)360' clockwise, by degrees. 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.

Image Details

Image Ref.
 
10282302

© Science Museum / Science & Society Picture Library

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