David White Theodolite

Description
This 9-inch theodolite was made for the U. S. Coast and Geodetic Survey, and designed for first order triangulation. It dates from the mid-1930s. New, it cost $2,175. It is marked "David White Co. Milwaukee Wis. No. 9049" and "USC&GS No. G362." The horizontal circle is graduated to degrees, and read by opposite micrometers with drum dials to 30 seconds. The vertical circle is graduated to 10 minutes, and read by opposite verniers and magnifiers to single minutes. The David White Co. was established in 1895, and renamed the David White Instrument Co. in 1956.
Ref: David White Co., Catalog A, 7th edition (Milwaukee, Wisconsin, about 1937), pp. 103-104.
Object Name
geodetic theodolite
maker
David White Co.
Measurements
overall: 10 in; 25.4 cm
horizontal circle: 9 in; 22.86 cm
vertical circle: 5 1/2 in; 13.97 cm
telescope: 13 in; 33.02 cm
place made
United States: Wisconsin, Milwaukee
ID Number
1986.0395.11
accession number
1986.0395
catalog number
1986.0395.11
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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