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Physical Sciences Collection - Surveying and Geodesy

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Alidade - click to enlarge

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Alidade

Catalogue number:
PH*326109

Inscriptions:
"Secretan à Paris"

Dimensions:
length 22 inches; height 7.25 inches

Discussion:

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.

Further Information:

Secretan
Alidade

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