Gurley Wye Level

Description
"Of the different varieties of the leveling instrument, that termed the Y Level, has been almost universally preferred by American engineers, on account of the facility of its adjustment and superior accuracy," declared Gurley in 1871. At that time, Gurley offered four different levels, with telescopes of 16, 18, 20, and 22 inches long. Since the "W. & L. E. Gurley, Troy, N.Y." signature on this example was engraved by hand, the level was made between 1852 when Gurley began in business, and 1876, when Gurley's new engraving machine was up and running. New, with tripod, this level cost $110. It belonged to Bowdoin College.
Ref: W. & L. E. Gurley, Manual of the Principal Instruments used in American Engineering and Surveying (Troy, N.Y., 1871), pp. 197–118.
W. Skerritt, "W. & L. E. Gurley's Engraving Machine," Rittenhouse 11 (1997): 97–100.
Location
Currently not on view
Object Name
level (wye)
date made
1852-1876
owner
Bowdoin College
maker
W. & L. E. Gurley
Measurements
telescope: 18 in; 45.72 cm
place made
United States: New York, Troy
ID Number
PH*329727
catalog number
329727
accession number
278336
subject
Measuring & Mapping
Surveying and Geodesy
See more items in
Medicine and Science: Physical Sciences
Surveying and Geodesy
Data Source
National Museum of American History, Kenneth E. Behring Center
cited
W. & L. E. Gurley. Manual of the Prinicipal Instruments Used in American Engineering and Surveying; 17th Edition
Additional Media

Visitor Comments

Add a comment about this object

**Please read before submitting the form**

Have a comment or question about this object to share with the community? Please use the form below. Selected comments will appear on this page and may receive a museum response (but we can't promise). Please note that we generally cannot answer questions about the history, rarity, or value of your personal artifacts.

Have a question about anything else, or would you prefer a personal response? Please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Image CAPTCHA
Enter the characters shown in the image.