Smithsonian - National Museum of American History, Behring Center

 
Physical Sciences Collection - Surveying and Geodesy

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Graphometer - click to enlarge

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Graphometer

Catalogue number:
PH*219497

Inscriptions:
"Delure A Paris"

Dimensions:
length 9.5 inches; needle 1.5 inches

Discussion:

The semicircle of this graphometer is graduated to single degrees, numbered clockwise and counterclockwise, and read by diagonal scales at either end of the alidade to 10 minutes. Delure worked in Paris in the early 18th century.

Further Information:

Graphometer

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