A complete treatise on practical land-surveying, in seven parts; . Ditto on the line D A. (Part IV. A B. 3484825 Sara. Area 17a 1r. 27^ p. PROBLEM III. FIELDS OF MORE THAX FOUR SIDE>. TVhen a field consists of more than four sides, you rnusrdivide it into triangles and trapeziums, agreeably to the direc-tions given in Part III. Prob. 5. Then take the dimensionsof each, as directed in the last two problems. Note.—Notwithstanding what has already been advanced with regard totaking proof-lines, you are again requested never_to omit measuring suchdistances as will enable you to confirm e
A complete treatise on practical land-surveying, in seven parts; . Ditto on the line D A. (Part IV. A B. 3484825 Sara. Area 17a 1r. 27^ p. PROBLEM III. FIELDS OF MORE THAX FOUR SIDE>. TVhen a field consists of more than four sides, you rnusrdivide it into triangles and trapeziums, agreeably to the direc-tions given in Part III. Prob. 5. Then take the dimensionsof each, as directed in the last two problems. Note.—Notwithstanding what has already been advanced with regard totaking proof-lines, you are again requested never_to omit measuring suchdistances as will enable you to confirm every part of your survey. Some mayperhaps deem this tedious and superfluous ; but the satisfaction which a Sur-veyor finds, when his lines meet correctly, fully compensates him for his ad-ditional labour. Beside, he had certainly much better be at the pains of de-tecting his own errors, than expose himself to ridicule, by suffering them tobe detected by some other Surveyor. EXAMPLES. 1. It is required to find the area of a field, from the followingnotes. Diag. m, proof-line, goes to D,and measures 285. Part IV.) LAND-SURVEYING 143 Begin at AC 1200 1000 R. off A. E A 393R. off E. DE 692R, off D. CD 620R. off C. BC 535R, off B. AB 1334 1000 A. Range Diag. W.
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