Dietzgen Surveyor's Vernier Compass

Description
Dietzgen introduced this form in the 1930s, describing it as a Surveying and Timber Cruisers’ Compass of an "improved type as made by us for the U.S. Government." Dietzgen designed it to make "the entrance of moisture or dust practically impossible." The needle ring is graduated to degrees, and numbered in quadrants from N and S. A pinion with capstan head, located outside the box at W and marked "Declination," is used to offset the compass for magnetic variation. The National Imagery and Mapping Agency transferred this example to the Smithsonian in 2000. The signature reads "Dietzgen Made in U.S.A."
Ref: Dietzgen, Catalogue (Chicago, 1938), p. 617.
Location
Currently not on view
maker
Dietzgen
Measurements
overall: 4 1/2 in; 11.43 cm
needle: 3 in; 7.62 cm
ID Number
2000.0257.15
accession number
2000.0257
catalog number
2000.0257.15
Credit Line
U.S. Department of Defense, National Imagery and Mapping Agency, Geodesy and Geophysics Department
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History, Kenneth E. Behring Center

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