Graphometer

Graphometer

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Description
This graphometer, purchased in Paris ca. 1890 and probably made there as well, has a silvered semicircle that is graduated to 30 minutes, numbered clockwise and counterclockwise. It is read by verniers at either end of the alidade to single minutes. There is a level on the alidade.
Location
Currently not on view
Object Name
graphometer
owner
Engineering Societies' Library
Measurements
overall: 9 in; 22.86 cm
needle: 2 1/2 in; 6.35 cm
overall in box: 7 in x 10 in x 7 1/2 in; 17.78 cm x 25.4 cm x 19.05 cm
ID Number
PH.319962
catalog number
319962
accession number
241593
Credit Line
Engineering Societies Library
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Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History
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