Hagger Backstaff

Description
The frame of this instrument is rosewood, while the arcs, brace, and vanes are boxwood. The frame is inscribed "Wm. G. Hagger Newpt R. Island For M–" and "364." The "364" inscribed on the back of the larger arc is probably a serial number, indicating that this instrument dates from around 1773.
William Guyse Hagger (1748-1832) was an instrument maker in Newport, Rhode Island, until the Revolution, when British troops occupied that city.
Ref: Deborah J. Warner, "Davis Quadrants in America,"Rittenhouse 3 (1988): 23-40, on 32-33.
Location
Currently not on view
Object Name
backstaff
date made
ca 1773
maker
Hagger, William G.
Measurements
overall: 17.5 cm x 68 cm x 39 cm; 6 7/8 in x 26 25/32 in x 15 11/32 in
place made
United States: Rhode Island, Rhode Island, Newport
ID Number
PH*319029
catalog number
319029
accession number
236168
subject
Measuring & Mapping
Navigation
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Medicine and Science: Physical Sciences
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Data Source
National Museum of American History, Kenneth E. Behring Center
Additional Media

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