Blattner & Adam Common Theodolite

This instrument belonged to the University of Missouri–Columbia. It dates from the late 19th century, but represents a form that was widely used in the 18th century. It has a pair of sight vanes (one missing) attached to the circle, and another pair on the alidade. The circle is graduated to 30 minutes, and read by vernier to single minutes. The signature reads "Blattner & Adam St. Louis" and "No.5698." Henry Blattner and Frank Adam were brothers–in–law who worked together from 1872 to 1891.
Currently not on view
Blattner & Adam
place made
United States: Missouri, St. Louis
baseplate: 8 in; 20.32 cm
needle: 5 in; 12.7 cm
overall in box: 4 5/8 in x 9 1/4 in x 9 1/2 in; 11.7475 cm x 23.495 cm x 24.13 cm
ID Number
catalog number
accession number
Credit Line
University of Missouri-Columbia, Department of Civil Engineering
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Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History


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