- 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
- Data Source
- National Museum of American History
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