172 



AGRICULTURE, 



the same drain be cut i8 ir'. at too and 8 in. at bottom, to*" 

 mean width will be 13 in., ana 2.65 cubic yards of eartb 

 will have to be removed in cutting each rod : so that if lue 

 digging of the drain costs 6 cents per cubic yard of earth 

 moved the narrow drain will cost 11 cents per rod, and the 

 other nearly 16 cents per rod, showing the cost to be one 

 half larger, quite unnecessarily. 



*' The same table will be found useful in helping to fix the 

 relative prices of deep and shallow drains ; but it must be 

 recollected that the deeper drains will be increased in cost 

 not only by reason of the greater quantity of earth which 

 has to be moved, but also because of the increased labor of 

 lifting the earth to the surface from a greater depth." 



LI3I1T OF SIZE OF TILE TO GRADE AND LENGTH. 



RAINFALL. (McConnell.) 



