134 DEPARTMENT OF AGRICULTURE GEORGIA. [420] 



of lime, evenly distributed through the clay, will serve as 

 a flux in burning the tile. 



If there is too much clay, the pipe will be liable to warp 

 or crack in drying. 



Machines for manufacturing drain tile cost about $250. 

 The tile is made in pieces from one foot to eighteen 

 inches in length Tile having 1 J- inches inside diameter 

 cost, at present, $18. 00 per thousand feet, but can be made 

 much cheaper on the farm. 



The forms principally used are the sole and the round 

 tile. The former is objectionable on account of the lia- 

 bility to warp at right angles to the flat side, and thus in- 

 terrupt the continuity of the fall. 



While the round tile is not less liable to warp, it can be 

 laid on the side of the warp and thus secure uniformity of 

 fall. 



They are sometimes made with unbeveled edges, and 

 united by collars ; but the cost of the latter is so great, the 

 beveled edges are preferred. 



If the inside of one end of each pipe is beveled, and the 

 outside of the other, the union is sufficiently exact to pre- 

 vent displacement, and the cost of collars avoided. 

 The following cuts will sufficiently illustrate the different 

 forms : 



Fig. 27 Round tile with collar. 



Fig. 28 Sole tile. 



Round tile with inside bevel. Fig. 29. Same with outside bevil. 



The question is often asked, " How does the water get 

 into the pipe?" When the number of joints in a given 



