A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 474
points, A, B, C, D,etc., such that the signal at 0 can beseen from all of them, and that the tri-angles ABO, B C 0, etc., shall be asnearly equilateral as possible. Measureone side, A B for example. At A measurethe angles 0 A B and OAG; at B meas-ure the angles 0 B A and 0 B C ; and soon, around… … 460 TRIANGULAR SURVEYING. or the odd numbers in the figure, should equal the product of thesines of the remaining angles, the even numbers in the figure. The triangles A O B, B O C, COD, etc., give the following proportions[Trigonometry, Art. 12, Theorem I] : A 0 : O B :: sin. (2) : sin. (1); OB :0…
Surveying
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