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Theodolite

Catalogue number:
PH*309668

Inscriptions:
"Fauth & Co. Washn D.C." and "U.S.C.&G.S. No. 122"

Dimensions:
height 9.5 inches; horizontal circle 4.25 inches diameter; vertical circle 3.5 inches diameter; telescope 7.25 inches long

Discussion:

This instrument was made between 1878 when the United States Coast Survey became the United States Coast and Geodetic Survey, and 1887 when Saegmuller began putting serial numbers on Fauth instruments. It was described as variously a Reconnoissance and Mining Transit or a Complete Transit Theodolite. Its horizontal and vertical circles, each of 4 inches diameter, are divided on silver, and read by opposite verniers to single minutes. New, it sold for $200.

Ref: Fauth & Co., Catalogue of Astronomical and Surveying Instruments (Washington, D.C., ca. 1877), p. 33.

Further Information:

Theodolite
Fauth
Saegmuller