Theodolite

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Description:

This instrument is marked "L. Casella, Maker to the Admiralty & Ordnance LONDON 5227" and "U.S.C.&G.S." It was made between 1878, when the U. S. Coast Survey became the U. S. Coast and Geodetic Survey, and the death of Louis Casella in 1897. Casella termed it a "Transit Theodolite . . . with achromatic telescope." New, it cost £24.

Ref: L. P. Casella, List of a Few Instruments in General Use, Selected from the General Catalogue of Standard Meteorological and Other Instruments for Observatories, Travelers and Explorers, and the Army and Navy (London, 1896), p. 26.

Maker: Casella, Louis Paschal

Location: Currently not on view

Place Made: United Kingdom: England, London

See more items in: Medicine and Science: Physical Sciences, Surveying and Geodesy, Measuring & Mapping

Exhibition:

Exhibition Location:

Related Publication: Clifton, Gloria and Gerard L. E. Turner. Directory of British Scientific Instrument Makers 1550-1851, Casella, L. P.. List of a Few Instruments in General Use, Selected from the General Catalogue of Standard Meteorological and Other Instruments for Observatories, Travellers and Explorers, and the Army and Navy

Data Source: National Museum of American History

Id Number: PH.309657Catalog Number: 309657Accession Number: 106954

Object Name: theodolite

Measurements: overall: 11 3/4 in; 29.845 cmhorizontal circle: 4 1/2 in; 11.43 cmvertical circle: 4 1/2 in; 11.43 cmtelescope: 11 in; 27.94 cmneedle: 1 7/8 in; 4.7625 cmoverall: 12 1/4 in x 5 3/4 in x 11 5/8 in; 31.115 cm x 14.605 cm x 29.5275 cm

Metadata Usage: CC0

Guid: http://n2t.net/ark:/65665/ng49ca746a5-6fd0-704b-e053-15f76fa0b4fa

Record Id: nmah_747553

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