WASHING AND STERILIZING 



197 



Fig. 50.— Cross-section of concrete sterilizer. 



and is secured by six one-half inch iron rods, two feet 

 long and embedded in the concrete walls, one being placed 

 at each corner, and one on either side midway between the 

 corners. This arrangement not only strengthens the tank, 

 but also makes the cover fit tighter. 



