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, &cIllustrated by four hundred engravings, and a magnetic chart . (189) By transversals. Let AB be the required distance. Seta stake, C, in the line prolonged;set another stake, D, so that C andB can be seen from it; and a thirdstake, E, in the line of BD pro-longed, and at a distance from Dequal to the distance from D to a fourth stake, F, at the intersection of EA and CD. AC ^C, AF and FE. Then is
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, &cIllustrated by four hundred engravings, and a magnetic chart . (189) By transversals. Let AB be the required distance. Seta stake, C, in the line prolonged;set another stake, D, so that C andB can be seen from it; and a thirdstake, E, in the line of BD pro-longed, and at a distance from Dequal to the distance from D to a fourth stake, F, at the intersection of EA and CD. AC ^C, AF and FE. Then is AB = -^ (FE—AF). (190) In a Town. Cases may occur,m the streets of a compactly bmlt town,in which it is impossible to measure alongany other luies than those of the figure represents such a case, inwhich is required the distance, AB, be-tween points situated on two streets whichmeet at the pouit C, and between whichruns a cross-street, DE. In this casemeasure AC, CE, CD, DE and is the required distance Measure
Size: 1871px × 1335px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectsurveying, bookyear18
