Secretan Alidade

Description
This brass alidade has folding sights that are centered on the beveled edge. It belonged to Mount St. Mary's College in Emmitsburg, Md. A label in the box reads: "Lerebours & Secretan, Secretan Successeur, Optician de S. M. l'Empereur, de l'Observatoire & de la Marine. Magasins: 13, Rue Du Pont-Neuf, Ateliers: 9, Rue Mechain, Faubg St. Jacques Paris." The address of the atelier suggests a date of around 1870. The firm was still in business in 1930.
Location
Currently not on view
Object Name
alidade
date made
ca 1870
maker
Secretan, Marc Francois
Physical Description
brass (overall material)
Measurements
overall: 7 1/4 in x 22 in; 18.415 cm x 55.88 cm
place made
France: Île-de-France, Paris
ID Number
PH*326109
catalog number
326109
accession number
257245
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
Mount St. Mary's College

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