Hagger Theodolite

This theodolite belonged to Smith College, but was made well before that school was established. 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.
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
place made
United States: Maryland, Baltimore
ID Number
accession number
catalog number
Measuring & Mapping
Surveying and Geodesy
See more items in
Medicine and Science: Physical Sciences
Surveying and Geodesy
Data Source
National Museum of American History, Kenneth E. Behring Center
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