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Physical Sciences Collection - Surveying and Geodesy

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Telescopic Alidade - click to enlarge

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Telescopic Alidade

Catalogue number:
PH*334894

Inscriptions:
"7049 EUGENE DIETZGEN CO. CHICAGO-NEW YORK"

Dimensions:
base 20.75 inches long; telescope 11 inches long

Discussion:
This alidade belonged to the University of Pittsburgh. There is a level mounted below the telescope. The vertical circle is graduated on the rim to 30 minutes and read by vernier to single minutes. The base is skeletal. It come with a compass (serial number 6870), wooden plumbing arm, and clamps for holding the paper. It was made after the establishment of the Eugene Dietgen Co. in Chicago in 1893.

Ref: Eugene Dietzgen Co., Catalogue & Price List (Chicago, 1921), pp. 318-319.

Further Information:

Dietzgen
Alidade

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