200 FOBESTRY WORK 



up long enough to include the whole ground — say 400 

 yards in this case. 



These hnes are poled off, and also the line YX joining 

 them. The contents of the parallelogram thus formed 

 is 445 X 400=178,000 square yards. 



Then, using BY as a base line, an offset is made at Q to ^. 



The distance from B to Q is 250 yards, and the length 

 of QA 80 yards. 



Then, on base Una YX an offset is made from R, which 

 is found to be 80 yards from Y, to A, which is measured 

 — viz., 150 yards. 



Every 60 yards offsets are made and measured — viz., 

 SI 90 yards. TH 80 yards, UG 80 yards, VF 100 yards, 

 WE 114 yards, the distance between W and X being 70 

 yards, and from Z to D 176 yards. 



The figures for this are as foUows: 



250 X 80 

 Triangle AQB = _ — — 10,000 square yards. 



ParaUelogram Q.422r = 150x80 =12,000 



Trapezoid BSAI = ^ x 60 = 7,200 



8TIH =^5^x60 = 5,100 

 TUHO = ^^±^x 60 = 4,800 

 UVSF =^^±150x60 = 5,400 

 VWFE =i5^±ilix60= 6.420 

 PrZ£Z> = ^^ii^^x 65 = 9,425 

 60,;!45 



