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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.
Gurley made their first lightweight instrument—an aluminum transit—in 1876. But the prohibitive cost of aluminum kept them from manufacturing instruments of this material. Following World War I, Gurley introduced a line of instruments made of an aluminum alloy named Lynite.
This is marked "W. & L. E. Gurley, Troy, N.Y." Gurley described it 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.
zagadka literowa polegająca na wpisywaniu odgadywanych haseł w rubryki krzyżujące się ze sobą. Hasło do krzyżówki 'był nim Otello' - Znaleźliśmy 40 haseł. Trafność najlepszego hasła: 10/10'.
The Capitol Land Board appointed J.T. Munson to survey the Texas Panhandle land that would eventually become the legendary XIT Ranch. Surveyors of the time likely used a tool like this. Crafted by W. and L.E. Gurley, this transit was an advanced version of the compass, but with a telescope attached.
In 1886 Gurley made a basic design modification to its transits. The two most obvious changes were the introduction of spring opposed tangent screws, and the replacement of the straight legged "A" form telescope supports with a bent leg design.
Teledyne Corporation purchased W. & L. E. Gurley in 1968 and the company became Teledyne Gurley. Production of surveying instruments ceased in 1980 in the face of stiff foreign competition and the technological shift away from optical instruments.
