A system of geometry and trigonometry : with a treatise on surveying ... in which, also, the principles of rectangular surveying ... are fully explained: with a complete series of mathematical tables, and the necessary explanations (1830)
Flint, Abel, 1765-1825, Gillet, George, Barnard, Frederick A. P. (Frederick Augustus Porter), 1809-1889 · Hartford : Cooke & co. · leaf 49
rds and forwards, may just touchthe diagonal at A, and neither go the least above or below it; thatdistance in the dividers being measured on the scale will give thelength of the perpendicular. CASE III. To SURVEY A FIELD WHICH HAS MORE THAN FOUR SIDES, BYTHE CHAIN ONLY. Measure the several sides,… … 30 fiO Ch.L. AB 30.60 BC 20.40 CD 22.40 AC DE 16.20 AC EF 13.50 AE FA 28. Diagonals, Ch.L.45.35.24.20. To PROTRACT THIS FIELD. Draw the side AB, making it the given length 30.60 ; withthe diagonal AC 45 and the side BC 20.40, describe crossarcs as at C, from the points A and B as centres, and…
Surveying
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