300 



MARLING TABLES. 



TABLE III., showing the number of rectangular spaces, of various dimensions, 

 in an acre of land. 



It is scarcely necessary to direct the application of these tables 

 to practical operations; and therefore a single example only will 

 be offered. Suppose a farmer's marl contains about 40 per cent, 

 of carbonate of lime, and he wishes to give 1 per cent, to his de- 

 signed tilled depth of 5 inches. He takes the number 40 per cent, 

 in the first column of Table II., and passes thence in the same 

 horizontal line across the table until reaching the column headed 

 tl 5 inches." The number at the intersection is 364.62, the num- 

 ber of bushels of marl required. Next, to apportion this quantity 

 to the acre. The heaps he can most conveniently make, we will 

 suppose, will be 8 bushels. Dividing 364.62 by ^ight, gives about 

 45 heaps required for the acre. Then referring to Table III., for 

 that number of spaces, or the nearest to that number, in an acre, 

 it is seen that the distances of 



14 X 8 yards, will make 43 heaps. 



13 X 8 " 46 



11 X 10 " " 44 



Either of these quantities would be suitable enough ; and the 

 farmer would choose the distances which will best suit his width 



