A treatise on surveying and navigation: uniting the theoretical, the practical, and the educational features of these subjects (1852)
Robinson, Horatio N[elson], 1806-1867. [from old catalog] · Cincinnati, J. Ernst · leaf 18
S. Join SC, and it will be the per-pendicular required. Proof, (th. 15, b. 1 The following is another method, whichis preferable, when the given point, C, is ator near the end of the line. Take any point, 0, which is manifestlyone side of the perpendicular, and join 0 C;and with 0 C, as a radius,… … PROBLEM 4. From a given point without a line, to draw a perpendicular to thatline. Let AB be the given line, and 0 thegiven point. From C, draw any obliqueline, as Cn. Find the middle point ofCn by (problem 1), and from that point,as a center, describe a semicircle, havingCn as a diameter. From the…
Surveying · Navigation
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