A treatise on surveying, comprising the theory and the practice (1906)
Gillespie, William Mitchell, 1816-1868, Staley, Cady, 1840- · New York D. Appleton · leaf 431
isometrical projection has been used, but military or cavalier projection is best. FiQ. 578 LOCATING NEW LINES. 849. Second Object. To determine, on the surface of the ground,where to sink a shaft to meet a desired point in the underground workings. To do this, repeaton the surface of theground the… … LOCATING NEW LINES. 421 850. When the Mine is entered by an Adit (Fig. 578). Set thetheodolite at the entrance, and get the direction of the adit andprolong it up the hill—i. e., in the same vertical plane. The thirdadjustment is here important. If the line has to be pro-longed by setting the…
Surveying
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