EXPERIMENT STATION BULLETINS. 



505 



to close the joint sufficiently to prevent the soil from working through 

 the tile. 



MAKING OPENINGS THROUGH TILE. 



Fig. 26. Five inch tile with small opening, and hammer used in making the opening. 



Fig. 27. Five inch tile shown in Fig. 26 with opening enlarged to receive three inch lile. The three 

 inch tile is shownrwith end shaped to set in the ,ot)ening in"the larger tile. I he larger hairmer used is 

 also shown 



An opening through the wall of a section of tile is easiest made with 

 what is called a tile pick. With care the opening can be made with 

 a small headed hammer by first knocking a small opening in the wall 

 about where the center of the opening should be and then carefully 

 chipping away the edges of the opening until it is made sufficiently large. 

 With the smaller sizes of tile, the section should be held in one hand 

 while the opening is being made with the hammer in the other hand. 

 See Figs. 26, 27 and 28. 



