THE CONQUEST OF DISEASE 



developed. This diabetes, produced artificially 

 in dogs, is similar to human diabetes. In each 

 there is an inability to oxidize sugar, and in 

 each there is present in the blood a poison 

 called oxybutyric acid. In many cases of hu- 

 man diabetes, disease of the pancreas is found 

 at autopsy; in some cases it is not found; but 

 there are functional disturbances which neither 

 the autopsy or the microscope can discover. 

 This disease is responsible for over 6000 deaths 

 annually in the United States. The experi- 

 mental study of its nature is to be looked to as 

 offering a hope that we shall some day know a 

 cure for it. Already, the lessons learned from 

 animal experimentation are being applied 'suc- 

 cessfully in the interest of man. 



Rabies. Rabies, hydrophobia or lyssa, is a disease 



which makes an undying impression upon those 

 who have seen it, but which is so horrible and bi- 

 zarre as to seem unreal to those who have never 

 witnessed its manifestations. The disease has 

 been observed in the dog, man, fox, cat, wolf, 

 jackal, hyena, badger, marten, horse, cow, 

 sheep, pig, goat, antelope, deer, guinea pig, and 

 rabbit. It prevails in all countries. In 1604 

 there was a severe outbreak in France. In the 

 following century all of Europe suffered from 



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