TABLE V. LENGTHS AND BREADTHS WHICH GIVE AN ACRE. 183 



Yd. Ft. In. 



Opposite yhich stands the width for 1 acre = 60 1 6 

 For the 20 poles, or J of an acre, take an 



eighth of the above = . . . 7 1 8J 



Base of the triangle required, . . 68 2J 



By the second method, viz., by taking the whole length of the 

 perpendicular, = 160 yards, and twice the quantity to be set off, 

 SB 2 acres, 40 poles, or 1 rood. 



Look in the Table for 160 yards, the length of the perpendi- 

 cular. 



Yd. Ft. In. 



Opposite which, stands width for 1 acre = 30 9 

 Set down for the other acre = . .3009 



For the rood, take one-fourth of the acre = 7 1 8J 



Base of the triangle required, as above, . 68 2 J 



This Table shows the space or length passed over in ploughing 

 an acre, at any given width of furrow. Thus with a furrow 9 

 inches wide, the distance passed over is 19360 yards, or 1 1 miles ; 

 with a furrow of 10 inches wide, 17424 yards, or 9 miles, 7 fur- 

 longs, 8 poles, exclusive of turnings, &c. And when the average 

 rate or speed at which the cattle proceed is known, the time 

 necessary to plough a field, or any portion of it, of which the 

 content has been ascertained may be calculated. The Table also 

 shows what length of a drill or ridge, at any width, is required to 

 umke an acre. 



TABLE V. LENGTHS AND BREADTHS WHICH GIVE AN ACRE. 



