250 



THE 8U&AE BEET. 



of being wanting in ventilation. The disasters before 

 spoken of were much to be dreaded. 



A type of silo frequently employed (see fig. 56) 

 possesses but one advantage, and that is preventing 



Pig. 56. 



Longitudinal section. 



Vertical section. 



Walls of earth preTchting the disease from spreading. 



the disease from passing through the entire mass when 

 one portion is attacked, this being accomplished by 



Longitudinal section. 



Fig. 57. 



Vertical section. 



Type of silo permitting the water resulting from evaporation to settle. 



walls of a certain thickness. As shown above, a slant 

 is given to facilitate the flow of water, etc. Here we 

 have no attempt to ventilate, but in the next (fig. 57) 



