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 45
ound toslope in all directions from the pointC, which is the summit of a hUl.Then the lines BC, DC, measured onthe slope, are longer than if measur-ed on a level, and the field ABCD,of Fig. 25, platted with these longlines, would take the shape ABGDin Fig. 26; and the field BCEF,of Fig. 25, would… … CHAP IV.] Calculating the Content. 39
Surveying
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
