A treatise on surveying and navigation: uniting the theoretical, practical, and educational features of these subjects (1857)
Robinson, Horatio N[elson], 1806-1867. [from old catalog] · Cincinnati, J. Ernst; Toledo, Anderson, Burr, & co. · leaf 110
AS be the line toward the sun,along the ground, AE a fine due east, andMm a true meridian line. The angle SAMmust equal 9° 17. To make that angle, take.^^, one chainor 100 links ; from S, draw the line SEat right angles to AS, by means of asurveyors cross.* From £take SIS, of such a value as will… … SURVEYING. As 100. : tf^Rad. : tan. 9° 17 Whence „„ 100. (tan. 9° 17) 9.213405 2 108 SE=16.S47 links. 1.213405 That is, from S measure off 16 and a little more than -J- of a link,and there is the point E. A line drawn from A to E, is a due eastand west line. If we put the surveyors cross on this…
Surveying · Navigation
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
