Geologist's Compass
name: label: maker
content: Keuffel & Esser Co.
notes: label: Description
content: This is an aluminum compass with brass sights that was designed for topographical work. The raised rim and beveled outer ring are graduated every degree and numbered every 10 degrees in quadrants from north and south. The northeast quadrant of the face has a variation scale that extends 27 degrees one way and 43 degrees the other; this is graduated to degrees, and reads by folded vernier to 5 minutes. The southern half of the face is graduated to degrees, and equipped with a pendulum clinometer pivoted at the center. There are level vials on the SE and SW corners of the plate. The four beveled edges of the plate are graduated, one to inches and tenths, one to inches and eighths, and two as protractors. The back of the plate has a diagram showing the arrangement of township numbering. The signature reads "KEUFFEL & ESSER CO NEW YORK." Other marks read "U.S. INDIAN FOREST SERVICE. DEPT OF THE INTERIOR" and "1958." New, with ball joint and socket for mounting on a jacob staff, this compass cost $25. The University of Missouri at Columbia donated it to the Smithsonian.
label: Description
content: Ref: Keuffel & Esser, <i>Catalogue</i> (New York, 1913), p. 420.
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, New York City
setName: label: See more items in
content: Medicine and Science: Physical Sciences
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content: Surveying and Geodesy
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content: Measuring & Mapping
creditLine: label: Credit Line
content: University of Missouri-Columbia, Department of Civil Engineering
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.333652
label: catalog number
content: 333652
label: accession number
content: 300659
objectType: label: Object Name
content: Pocket Compass
physicalDescription: label: Measurements
content: overall: 4 in x 4 in; 10.16 cm x 10.16 cm
label: Measurements
content: overall: 1 7/8 in x 5 1/2 in x 4 3/4 in; 4.7625 cm x 13.97 cm x 12.065 cm