THE CURATIVE POISON 131 



"We now possess virus-vaccines against an- 

 thrax, capable of warding off the deadly dis- 

 ease, without ever proving fatal themselves 

 living vaccines, that may be cultivated at will 

 and transported anywhere without suffering 

 harm; vaccines, in short, that are prepared by 

 a method which we have reason to believe is 

 susceptible of being generalised, because it has 

 once already been put into practice for the pur- 

 pose of obtaining vaccine against chicken chol- 

 era. Because of the character of the conditions 

 which I have here enumerated, and looking at 

 the question only from the scientific point of 

 view, I may say that the discovery of vaccine 

 for anthrax constitutes a perceptible progress 

 in advance of Jenner's vaccine, because the lat- 

 ter was not obtained as a result of experi- 

 ments." 



Pasteur no longer met with the same obsta- 

 cles that had confronted his method for the cul- 

 ture of silk-worms; his vaccines for anthrax 

 were in demand in every cattle-raising district 

 of France. Within one year after the above- 



