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Directional Transit Theodolite, circa 1840s

Directional Theodolite, brass viewing scope 

Title: Directional Transit Theodolite
Accession #: NHHC 1967-415-AB
Circa: 1840's
Size: 26 x 10
Medium: Brass
Location: Headquarters Artifact Collection, Naval History and Heritage Command

One brass directional transit theodolite. A transit theodolite is a navigational device used for measuring horizontal and vertical angles as well as distance and determining elevation. It is made of brass with dials, knobs and a spyglass. The circular plate is engraved "E. & G. W. Blunt / New York / Improved by Richard Patten & Son, Washington City." 

Edmund Blunt's sons opened a shop in New York in 1824, trading as E. & G. W. Blunt until 1866. Richard Patten and Sons were located in Washington City (Washington D.C.) in the 1840s before moving to Baltimore the early 1850s. This would indicate that this theodolite was made sometime in the 1840s.

Detail view of Directional Theodolite

Published: Tue May 05 11:57:08 EDT 2020