Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 306
e telescope ofthe transit, or level, to arrange all its points in the samevertical plane. Great care must be taken to keep the measuringchain horizontal, for it is the horizontal distances that are re-quired. At different points of this line, as a, h, c, d^ &c., letstakes be driven, and let the… … with which the surface is to be delineated; their differences oflevel ought not to exceed once and a half, or twice, the distancebetween the horizontal planes of section. Having placed stakes, and measured all the distances alongthe line AB, run another line down the hill, as AC, placingstakes at…
Surveying
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