Surveyor's Compass
name: label: maker
content: W. & L. E. Gurley
notes: label: Description
content: Patent model for W. & L. E. Gurley, "Improvement in Telescope Attachments for Surveyors’ Compasses," U.S. Patent #205,742 (July 9, 1878).
label: Description
content: The basic instrument is a standard small compass with a north-south level on the north arm, and an east-west level and an outkeeper on the south arm. The hand-engraved signature indicates that the compass was made before the middle of 1876. The telescope, which attaches to one of the sight vanes, was presumably made shortly before the patent application was submitted in June 1878. The inscription reads "W. & L. E. Gurley" and "Troy, N.Y."
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, Troy
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Surveying and Geodesy
label: See more items in
content: Measuring & Mapping
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.308958
label: catalog number
content: 308958
label: accession number
content: 89797
label: patent number
content: 205,742
objectType: label: Object Name
content: Surveyor's Compass
label: Object Type
content: Patent Model
physicalDescription: label: Measurements
content: overall length: 12 3/4 in; 32.385 cm
label: Measurements
content: needle: 4 in; 10.16 cm
label: Measurements
content: telescope: 8 5/8 in; 21.9329 cm
label: Measurements
content: overall; case: 4 1/4 in x 13 3/4 in x 6 5/8 in; 10.795 cm x 34.925 cm x 16.8275 cm