Buff & Berger Alidade

Description
This alidade belonged to Columbia University. Its vertical arc, which extends 35 degrees either way, is graduated to 30 minutes and read by vernier to 2 minutes. The base has a skeletal structure, making it light and stiff. There is a separate striding level and trough compass. The "BUFF & BERGER BOSTON 2157" signature refers to a firm that traded, as such, from 1871 to 1898.
Ref: Buff & Berger, Hand-Book and Illustrated Catalogue of the Engineers' and Surveyors' Instruments (Boston, 1890), p. 104b.
Location
Currently not on view
Object Name
alidade
date made
1871-1898
maker
Buff & Berger
Measurements
telescope: 17 in; 43.18 cm
place made
United States: Massachusetts, Boston
ID Number
PH*335213
catalog number
335213
accession number
317998
subject
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
Credit Line
Columbia University
maker referenced
Buff & Berger. Hand-book and Illustrated Catalogue of the Engineers' and Surveyors' Instruments, Made by Buff & Berger

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