A complete treatise on practical land-surveying, in seven parts; . Area 6a. 1r. 27p. COMPUTATION OF THE AREA FROM THE THREE SIDES. TT 1462 + 1275-1-1029 3766 n_ „,._ Here — = —— = 1883, half the sum of the 2 2 three sides. Then 1883 - 1462 = 421, the first remainder; 1883 - 1275 = 608, the second remainder; and 1883 - 1029 = 854, the third remainder; whence -v/1883 X 421 X 608 X 854 =^411617533376 = 641574 square links, the area, equal to 6acres, 1 rood, and 26^ perches, nearly the same as before. THE SAME BY LOGARITHMS. The log. of 1883 = 421 =
A complete treatise on practical land-surveying, in seven parts; . Area 6a. 1r. 27p. COMPUTATION OF THE AREA FROM THE THREE SIDES. TT 1462 + 1275-1-1029 3766 n_ „,._ Here — = —— = 1883, half the sum of the 2 2 three sides. Then 1883 - 1462 = 421, the first remainder; 1883 - 1275 = 608, the second remainder; and 1883 - 1029 = 854, the third remainder; whence -v/1883 X 421 X 608 X 854 =^411617533376 = 641574 square links, the area, equal to 6acres, 1 rood, and 26^ perches, nearly the same as before. THE SAME BY LOGARITHMS. The log. of 1883 = 421 = 608 = 854 = Divide by the index of the root 2)1~ The quotient is the log. of 641574, the area ~~ Ill land-surveying. rPart IV. 2. It is required to construct a figure, and find its area, from .lowing n C A o - U - yg 15 55 212 ) R. [ B C 4 M 354 22S : >ffB. AB Q a proof-line,which goes to n, andmeasures 352 links. 48 V56 2 5 745 :ion for a proof-line. Begin at A. Range N. E. computation or the aw fpsbts, &c B. Part IF.) LAND-SURVEYING. 115 Having constructed the figure, you will find the line m n tomeasure 352 links, as in the field-book. You will also find theperpendicular B a, to be 528 links. Triangle ABC. 1252 per. 10016 25046260661056 25625 1280512 6400 25 56 81239 729243162 19359 Offsets taken on the line A B. 56 76 132 105 660132 13860 76 48 124 145 620496124 17980 228 48 1824 912 10944 ~64(Xn ! 19359 | 1 Double 13860 > areas 17980 | collected, 10944 i 68543 i mm. 12 ]16 LAND-SURVEYING. (Part IV. 22949
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