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Physical Sciences Collection - Surveying and Geodesy

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Theodolite - click to enlarge

Theodolite - click to enlarge

Click photos to enlarge.

Theodolite

Catalogue number:
2001.0300.02

Inscriptions:
"AUGUST LINGKE & CO FREIBERG IN SA NO 4265"

Dimensions:
horizontal circle 11.5 cm diameter; vertical circle 8.5 cm diameter; telescope 20.5 cm long; striding level 8.5 cm.

Discussion:

This is clearly a German theodolite, quite unlike those made in England or the United States. Albert Joseph Seligman (1859-1935) probably bought it 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.

The horizontal circle is beveled, silvered, graduated to 20 minutes, and read by opposite verniers to single minutes. The vertical circle is silvered, graduated to 20 minutes, and read by opposite verniers to single minutes.

Further Information:

Lingke
Theodolite

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