186 THE INVISIBLE WORLD 



malignant pustules. The patient endures great 

 suffering. Death is almost certain. 



The chief, if not the only, remedy for this dis- 

 ease, is prevention. As it always comes from the 

 lower animals, prevent it among them, and it dis- 

 appears from the world. 



Happily, a vaccine for the inoculation of the 

 lower animals has already been discovered and 

 largely applied in Europe, where the disease has 

 chiefly prevailed. Before this discovery, about ten 

 per cent, of all the sheep, and five per cent, of all 

 the cattle, died yearly with this disease. Since its 

 discovery, the fatality has been reduced to less than 

 one half of one per cent. 



Among human beings, therefore, this disease is 

 now practically exterminated. This shows what 

 great hope there is for the world in the future dis- 

 covery of vaccines which shall prevent other dis- 

 eases. 



