120 DEY WELLS. 



6. Manner of laying the tile and completing the 

 drain. Beginning at the outlet, the trench can, of 

 course, be dug as narrow as possible, only allowing 

 space enough for the workman to place the tile. 

 The pipes should then be laid along the bank. If turf 

 is to be used for covering the joints, it should be 

 cut, and immediately at hand. The size of the pipes 

 for the mains must be determined by the number 

 of minors and the amount of water to be conveyed. 

 Generally one of four or five inches is sufficient ; 

 but when it is not, two can be placed abreast, or 

 one more above them. The workman, walking 

 backwards, should commence to lay the pipe care- 

 fully, securing a continuous channel, and preserving 

 the proper grade by the use of the line. The joints 

 are secured as the work goes on, and the earth care- 

 fully shovelled in, and trodden down as hard as 

 possible, to prevent the washing of the sand. 

 AVhere the minors join the main, the junction must 

 not be too abrupt, but should turn gradually, and 

 enter it upon a curve, that neither may be obstructed 

 by the meeting of the currents. 



There are many places where it is impossible to 

 find an outlet. If wells in the vicinity do not rise 

 to less than twelve or fifteen feet from the surface, 

 such tracts can be drained by digging dry wells, 

 and turning the water into them. 



It is very convenient to construct traps in the 

 orchard when draining. These are formed by 



