68 InUrumental InflruEiions 



Li. from E to C, and i Ch. 90 Li. from E 

 to D, and draw B C, C D, and D A. Laft- 

 ly, directing the Sights, the Edge of the Ru- 

 ler on E, to the Middle of the Gate of the 

 Fields draw E K, and on A D, draw the Gate 

 at K : In the fame Manner may any other ob- 

 fervable in the Hedges be laid down. 



To find the Content of this Trapezium. 



From the two Angles moft remote from each 

 other, A C, draw the Bafe Line A C, take 

 it in your CompaiTes, and fetting it on your 

 Scale, 'twill reach from the Point of 5 Chains 

 to the Point of 25 Links amongft the Diago- 

 nals. Set 5 Chains, 25 Links on A C, draw 

 B S, and D S, perpendicular to A C 3 B S ta- 

 ken from the Scale is, i Ch. 25 Li. and D S 

 is alfo 2 Ch. 56 Li. 



To find the Content of this Field. 



Multiply half the Bafe A C, by the Sum 

 of the two Perpendiculars B S, and S D, with- 

 out having any Regard to their being Deci- 

 mals, and cutting off 5 Figures of the Produft 

 to the right (becaufe i,oocco fquarc Links 

 makes an Acre) the remaining Figures are 

 Acres. 



Multiply thofe 5 Figures by 4, C4 Poles be- 

 ing an Acre) and cutting off 5 Figures, as be- 

 fore, the remaining Figures are Roods 5 mul- 

 tiply thofe 5 Figures by 40, cutting off 5 Fi- 

 gures 



