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
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… … 14 SURVEYING. PROBLEM 5. At a given point in a line, to make an angle equal to another givenangle. Let A be the given point in the line AJB,and D CE the given angle. From 0 as a center, with any radius,CE, draw the arc ED. From A, as a center, with the radiusAE= CE, describe an indefinite arc;…
Surveying · Navigation
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