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 126
CA DE. Then is AB = C Measure AC X DECD • If more convenient, measure CD in tkecontrary du-ection from the river, as in Fig.137, instead of towards it, and in other re-spects proceed as before. (203) By parallels. Let AB be the in-accessible distance. From any point, as C,range out a parallel to… … Then is AB CE Fig. 139. (204) By a parallelogram. Set a stake at any convenient pouit C. ^ Set stakes D and E, anywhere in ~ the alinements CA and CB. WithD as a centre, and a length of thechain equal to CE, describe an arc ;and with E as a centre, and a lengthof the chain equal to CD, describe…
Surveying
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