IOO PLANT DISEASE 



Therefore the conditions of a normal or 

 healthy blood tend to immunity, while the 

 conditions of an anaemic blood tend to disease, 

 and the variations in disease are produced 

 by corresponding variations in the food eaten. 



In other words, animal life living on normal 

 or the best foods, has its whole system worked 

 as nature intended it should be worked. 



And as the food degenerates from the normal, 

 so do the functions of animal life degenerate, 

 so that the greater the degeneration of the 

 food the greater the degeneration of the func- 

 tions, and the degree of variation in 'de- 

 degeneration accounts for the degree of varia- 

 tion in the virulence of a given disease in any 

 animal attacked. 



To show that these views work out in practice, 

 I will quote a few lines from the Cape Agri- 

 cultural Journal, of May 9, 1901. The Editor, 

 writing of Rambouillet sheep imported by 

 Mr. Rogers, of Glencairn, Cathcart Division, 

 South Africa, says 



" The least I can say is that I am more than 

 satisfied with them ; in fact, they have in every 

 way exceeded my most sanguine expectations. 



