COST OF DRAINING. 

 STONE-FILLER DRAINS AS IN FIG. 374. 



873 



TUBE OR PIPE-FILLED DRAINS, AS IN FIG. 376. 



" Where a fraction more or less than the number stated is due, the 

 signs or -f are put respectively." 



Suppose drains to be made 3 feet deep, and cutting and filling 

 costs Id. per rod, then the 



COST PER ACRE AT DIFFERENT WIDTHS WILL BE : 



The cost per acre, it is seen, ranges on the above scale from 

 4L 10s. 9|-fZ. at 33 feet apart, to 11. 18s. 8^d. at 18 feet apart. Deeper 

 drains in hard soils will cost more in cutting ; but upon easy digging 

 soils 3-feet drains will be accomplished at considerably less than *ld. 

 per rod. A great deal depends, however, upon the rate of wages. 



