Dietzgen Telescopic Alidade

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. The “7049 EUGENE DIETZGEN CO. CHICAGO-NEW YORK” signature refers to a firm that was established in Chicago in 1893. With the alidade there is a compass (serial number 6870), a wooden plumbing arm, and clamps for holding the paper.
Ref: Eugene Dietzgen Co., Catalogue & Price List (Chicago, 1921), pp. 318–319.
Currently not on view
Eugene Dietzgen Company
base: 20 3/4 in; 52.705 cm
telescope: 11 in; 27.94 cm
overall; case: 6 in x 22 1/8 in x 11 5/8 in; 15.24 cm x 56.1975 cm x 29.5275 cm
ID Number
catalog number
accession number
Credit Line
University of Pittsburgh
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History


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