A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 48
or in referring station marks, and also for making rough astronom-ical observations for latitude, time, and azimuth. TRIANG ULA TIOK 37 Fig. 44G is a theodolite, with an 8-inch horizontal circle, used inthe measurement of horizontal angles, and for astronomical work.Fig. 447 represents the latest… … on the Coast and Geodetic Survey. The greatest care possible wastaken in the construction of its parts. Two small finders, or verti-cal circles, are attached to the telescope. Means are provided forilluminating the cross hairs of the telescope. A micrometer isattached to the eye end, and a diagonal…
Surveying
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