Graphometer, European, 1701-1775

Made:: 1701-1800 in Europe

Brass graphometer with magnetic compass, fixed and movable alidade and wooden case, unsigned, European, 1701-1775

Circumferentors (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.

Details

Category:: Surveying

Collection:: Sir Henry Wellcome's Museum Collection

Object Number:: 1980-1626

type:: graphometer

credit:: On loan from the Wellcome Trust

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