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Description. This is a Standard Precise Transit, Reconnaissance Model (#112-T), with a telescopic solar unit attached to one standard "as constructed for the Bureau of Land Management." It can be used for standard surveys, as well as for determining the solar meridian quickly and efficiently.
- National Museum of American History
Surveyor's Transit. Usage Conditions Apply. Description:...
- National Museum of American History
W. & L. E. Gurley Description Gurley described this as a Surveyor's Transit with two verniers to the horizontal limb. The horizontal and vertical circles are silvered, graduated every 30 minutes of arc, and read by verniers to single minutes. There is a clamp and tangent to the telescope axis.
The transit is also equipped with a gradienter that measures elevations of the telescope, and that cost an additional $18. Gurley began making these gradienters in 1885. Gurley introduced the Light Mountain Transit in 1876.
Surveyor's Transit. Usage Conditions Apply. Description: Gurley described this as a Surveyor's Transit with two verniers to the horizontal limb. The horizontal and vertical circles are silvered, graduated every 30 minutes of arc, and read by verniers to single minutes.
Surveyor's Transit. Usage Conditions Apply. Description: Surveyors who carry instruments long distances, often over difficult terrain, are always concerned about weight. W. & L. E. Gurley made their first lightweight instrument—an aluminum transit—in 1876.
Gurley described this instrument as a Light Mountain Transit with two verniers to the horizontal circle. The inscription on this example reads "W. & L. E. GURLEY, TROY, N.Y." It has a 4-inch needle, vertical arc, hanging level, and clamp and tangent to the telescope axis.
Share Icon. Print; Object Details W. & L. E. Gurley Description
