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Althouth this theodolite belonged to Smith College, it is much older than that school. The "Hagger Maker Baltimore" signature refers to Benjamin K. Hagger, an instrument maker who worked in Baltimore during the period 1816–1824, and who later went into partnership with his eldest son. The horizontal circle and vertical arc are silvered, graduated every 30 minutes, and read by verniers to single minutes.
Currently not on view
Object Name
Hagger, Benjamin K.
place made
United States: Maryland, Baltimore
overall: 14 in; 35.56 cm
horizontal circle: 8 1/2 in; 21.59 cm
vertical arc: 8 in; 20.32 cm
needle: 4 1/2 in; 11.43 cm
telescope (closed): 12 1/4 in; 31.115 cm
hanging level: 5 1/4 in; 13.335 cm
overall in case: 15 3/4 in x 11 3/8 in x 12 1/8 in; 40.005 cm x 28.8925 cm x 30.7975 cm
ID Number
accession number
catalog number
Credit Line
Smith College
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History
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