Graphometer, 18th century.
2 9 c m
40cm
actual image size: 32cm x 21cm

Graphometer, 18th century.

© Science Museum / Science & Society Picture Library

Description

Circumferetors (with a full circle scale) and graphometers (with a half circle scale) were widely used in the 17th and 18th centuries for angle measurement. A joint on the support allowed for both vertical and horizontal use. This graphometer has a ball and socket fitting.
 

Image Ref.

10282296
 

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