Surveyor's Vernier Compass
name: label: maker
content: Randolph, Theodore F.
notes: label: Description
content: This compass is marked "T. R. RANDOLPH CINCINNATI. O." and "1234" and "PATENTED JUNE 24 '79." On June 24, 1879, Theodore F. Randolph received a patent (#216,759) for a surveyor's compass with a telescope sight, in which the telescope and its supports can be detached from the compass. In this example (which is missing the telescope and its supports) the raised rim is silvered, and graduated to 30 minutes. The variation arc, which is located on the compass face, extends 25 degrees either way, and reads by double vernier to single minutes. The carrying case is marked "PATENTED NOV. 9, 1880," referring to Randolphs' patent (#234,331) for a seamless leather container of this sort. This instrument belonged to the University of Missouri at Columbia.
label: Description
content: Ref: T. F. Randolph, <i>Illustrated Catalogue and Price List</i> (Cincinnati, 1892), p. 2.
label: Location
content: Currently not on view
place: label: place made
content: United States: Ohio, Cincinnati
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
publisher: label: Related Publication
content: Randolph, T. F.. Illustrated Catalogue and Price List
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.333647
label: catalog number
content: 333647
label: accession number
content: 300659
objectType: label: Object Name
content: transit
physicalDescription: label: Measurements
content: overall: 7 in; 17.78 cm
label: Measurements
content: overall in box: 5 1/2 in x 8 in x 8 in; 13.97 cm x 20.32 cm x 20.32 cm