Elements of surveying and navigation : with a description of the instruments and the necessary tables (1847)
Davies, Charles, 1798-1876 · New York : A.S. Barnes & Co. · leaf 60
ance cd. Mea-sure in the same manner the line fC; and the sum of thehorizontal lines ah, cd and /C, will be equal to AB, thehorizontal distance between Jl and C. 86. We come now to the measurement of angles, and forthis purpose several instruments are used. The one, however,which affords the most… … OF THE THEODOLITE. PL 1. The theodolite is an instrument used to measurehorizontal and vertical angles. It is usually placed on atripod ABC, which enters by means of a screw the lowerhorizontal plate DE, and becomes firmly attached to the bodyof the instrument. Through the horizontal plate DE,…
Surveying · Navigation
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