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A treatise on land-surveying; comprising the theory developed from five elementary principles; and the practice with the chain alone, the compass, the transit, the theodolite, the plane table, &c. Illustrated by four hundred engravings, and a magnetic chart (1875)

Gillespie, W. M. (William Mitchell), 1816-1868 · New York, D. Appleton · leaf 303

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required to .find the respective distances *•of these eight points; theonly data being the obser-vation, from each of thepoints of the second sys-tem, of the angles underwhich are seen the pointsvj the first system. This problem can be solved, but the great length and complicartion of the… … -< OHAP, IV.] To Supply Omissions 297 ^ CHAPTER IV. TO SUPPLY omssioxs. (439) Any two omissions in a closed survey, whether of thedirection or of the length, or of both, of one or more of the sidesbounding the area surveyed, can always be supplied by a suitableapplication of the principle of…

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