W. & L. E. Gurley Dumpy Level

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Gurley termed this an Explorer's Level, and described it as "a small, light model designed to meet the requirements of engineers for a compact and serviceable level for running preliminary lines in exploration work where it is not convenient to operate a large instrument." The design was introduced in 1914, and remained in production until 1934. This example is marked "W. & L. E. GURLEY TROY, N.Y." and "151265." The serial number indicates that it was made in 1915. It belonged to the U. S. Department of Agriculture. New, it cost $110.
Ref: W. & L. E. Gurley, Manual of the Principal Instruments used in American Engineering and Surveying (Troy, N.Y., 1920), p. 70.
Currently not on view
date made
W. & L. E. Gurley
place made
United States: New York, Troy
telescope: 6 1/2 in; 16.51 cm
overall in case: 6 in x 8 1/8 in x 5 in; 15.24 cm x 20.6375 cm x 12.7 cm
ID Number
catalog number
accession number
Credit Line
U.S. Department of Agriculture. Soil Conservation Service
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Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History