Haswell, Charles Haynes, 1809- [from old catalog] · New York, Harper & brothers · leaf 176
gthof the curve required. To Ascertain the Distance between two inaccessible Ob-jects, as A, IB—Fig. 26. (20.)A B From any point C draw a line C c, and bisect it ino; take any point e in the prolongation of A c, anddraw the line e r, making o e equal to o r. In like manner, take any point s in the… … ii^L To Ascertain the Distance of an inaccessible Object on aLevel Plane—Fig. 37. Let it be required to ascertain the distance betweenA and B, A beiug inaccessible. Produce the line in the direction of A B to any point,as o; draw the line o d at any angle to the line A B;bisect the line o d,…
Engineering · Mechanical engineering
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