A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 392
D as before. Set the index at 26° 34, and go along the line to E,where the objects are seen to coincide with each other; then is A Etwice A B, and hence E D = A B. Fig. 546. B … Oiherivise (Fig. 546). At A set off an angle, as CAD (ADbeing a prolongation of A B); then walk along the line A 0 with 382 MARITIME OR HTDROGRAPEIC SURVEYING. the index set to half that angle, looking at A directly, and B byreflection, till you come to some point, C, at which they coincide.Then is…
Surveying
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