Telescopic Alidade
name: label: maker
content: August Lingke & Co.
notes: label: Description
content: The telescope of this instrument has stadia wires and a hanging level. The base has a level vial, a screw adjustment, and a vertical arc that extends 50 degrees either way and that is read by vernier to single minutes. There is also a plumbing arm for use on plane tables.
label: Description
content: Albert Joseph Seligman (1859-1935) probably bought this alidade in the late 1870s, when he studied mining engineering at Freiberg, and he probably donated it to the Rensselaer Polytechnic Institute, his alma mater, around 1899, when he obtained a seat on the New York Stock Exchange. The signature reads "AUGUST LINGKE & CO FREIBERG IN SA NO 1315." A German silver tag on the wooden box reads "Albert J. Seligman New York."
label: Location
content: Currently not on view
place: label: place made
content: Germany: Saxony, Freiberg
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: Rensselaer Polytechnic Institute, Department of Civil Engineering
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2001.0300.03
label: accession number
content: 2001.0300
label: catalog number
content: 2001.0300.03
objectType: label: Object Name
content: Telescopic Alidade
physicalDescription: label: Measurements
content: telescope: 13 1/2 in; 34.29 cm
label: Measurements
content: base: 20 in; 50.8 cm
label: Measurements
content: overall in case: 5 in x 21 1/8 in x 9 3/8 in; 12.7 cm x 53.6575 cm x 23.8125 cm