Smithsonian - National Museum of American History, Behring Center

 
Physical Sciences Collection - Surveying and Geodesy

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Miner's Dial - click to enlarge

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Miner's Dial

Catalogue number:
2001.0300.05

Inscriptions:
"AUGUST LINGKE & CO FREIBERG IN SA NO 1111"

Dimensions:
needle 8 cm.; semicircle 24 cm diameter

Discussion:

This is a compass in a gimbal mount that can hang from a line. The silvered face reads counter clockwise, and has a raised rim graduated to 30 minutes. There is also a semicircle that hangs vertically from a line, and that is graduated to 30 minutes. Albert Joseph Seligman (1859-1935) probably bought this instrument in the late 1870s, when he studied mining engineering at Freiberg, and he probably donated it to the Rensselaer Polytechnic Institute, his alma mater, around 1899, when he obtained a seat on the New York Stock Exchange.

Further Information:

Surveyor's Compass
Lingke

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