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 118
show a meridian linethrough that point. Here the road bends a little, unclamp the index (being carefulthat J¥S rigidly retains its position), and direct it to the generaldirection of the road be. Mark the point c, by an object as before,and mark some other point, so as to secure the line (the other… … 116 SURVEYING. will mark out a meridian line at the point c, and tlus we can transferthe meridian line Mm to any other point whatever. Thus we may go to any point d, in the given line ; no matter,theoretically speaking, how many angles we have made during thetraverse. Placing the instrument at d,…
Surveying · Navigation
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