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Usage conditions apply
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.
Currently not on view
Object Name
Casella, Louis Paschal
place made
United Kingdom: England, London
overall: 11 3/4 in; 29.845 cm
horizontal circle: 4 1/2 in; 11.43 cm
vertical circle: 4 1/2 in; 11.43 cm
telescope: 11 in; 27.94 cm
needle: 1 7/8 in; 4.7625 cm
overall: 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
ID Number
catalog number
accession number
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Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History
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