Telescopic Alidade
name: label: maker
content: Keuffel & Esser Co.
notes: label: Description
content: This alidade has an inverting telescope, striding level, vertical arc reading 30 degrees each way, and separate trough compass. It is part of a complete plane table outfit that Keuffel & Esser described "as made for the U.S. Coast and Geodetic Survey" and sold for $175. The Survey acquired this example in 1893. The inscriptions read “KEUFFEL & ESSER CO. NEW YORK CHICAGO 2447" and "U.S.C.&G.S. No. 91.”
label: Description
content: Ref: Keuffel & Esser, <i>Catalogue</i> (New York, 1906), p. 408.
label: Location
content: Currently not on view
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
publisher: label: Related Publication
content: Keuffel & Esser. Catalogue of Keuffel & Esser Co., 32 Edition
creditLine: label: Credit Line
content: U.S. Coast and Geodetic Survey
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.309665
label: catalog number
content: 309665
label: accession number
content: 106954
objectType: label: Object Name
content: alidade (telescopic)
physicalDescription: label: Measurements
content: telescope: 10 in; 25.4 cm
label: Measurements
content: objective; aperture: 1 in; 2.54 cm
label: Measurements
content: overall in case: 5 5/8 in x 13 5/16 in x 8 5/16 in; 14.2875 cm x 33.81375 cm x 21.11375 cm