250 



THE SUGAR 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) 

 230ssesses but one advantage, and that is preventing 



Fiff. 56. 



Longitudinal section. 



Vertical section. 



AValls of earth preventing the disease from spreading. 



the disease from passing through the entire mass when 

 one portion is attacked, this being accomplished by 



Fig. 57. 



Loncfitudinal section. 



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) 



