A treatise on surveying ; in which the theory and practice are fully explained (1860)
Alsop, Samuel · Philadelphia, E. C. & J. Biddle & co. · leaf 119
nddistance of an elevated peak C (Fig.78) of a mountain rising abruptlyfrom the shore of a river, and notbeing able to find a level place fora base line, or a regular slope as-cending in a line from the point tobe measured, I selected two stations,the one A nearly opposite the base Dof a rock… … Sec. VI.] MISCELLANEOUS PROBLEMS. 117 measurements,—viz.: AB, 850 yards. At A, the angle ofposition of B and C was 87° 49; elevation of C, 35° 27;depression of J), 3° 25 45; elevation of top of a staff atB of same height as the instrument, 3° 14 30. At B, theangle of position of A and D was 47° 39,…
Surveying
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