Wye Level

Wye Level

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Usage conditions apply
The inscriptions on this small level read "HELLER & BRIGHTLY, Philad" and "U.S.G.S. 82." The U. S. Geological Survey transferred this instrument to the Smithsonian in 1908, noting that it had been used by the Water Resources Branch of the Survey but was no longer suited to the work of the organization. It must have been made to order, as it does not have a Heller & Brightly serial number, and it is not listed in Heller & Brightly's Remarks on Engineers' Surveying Instruments.
Currently not on view
Object Name
Heller & Brightly
place made
United States: Pennsylvania, Philadelphia
telescope: 6 1/4 in x 3 3/8 in x 11 3/4 in; 15.875 cm x 8.5725 cm x 29.845 cm
overall: 6 3/8 in x 3 1/16 in x 11 3/4 in; 16.1925 cm x 7.77875 cm x 29.845 cm
ID Number
accession number
catalog number
Credit Line
U.S. Geological Survey
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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