178 LOUIS PASTEUR 



be gainsaid. The skeptical Rossignol pronounced 

 it a "stunning success," and made a handsome 

 acknowledgment of his previous errors in regard 

 to microbiology. He assisted at the examination 

 of the blood of two of the dead sheep. This 

 showed an abundance of the bacilli of anthrax. 

 The last unvaccinated sheep died in the evening of 

 the day of the demonstration. 



Further trials of Pasteur's protective vaccine 

 yielded additional evidence of its efficacy. There 

 was a wide demand for vaccine, and about 34,000 

 animals had been vaccinated by the end of 1881, 

 and about 500,000 by the end of 1883. The 

 method became widely used in stock raising coun- 

 tries throughout the world, and has resulted in 

 saving millions of dollars and the lives of many 

 thousands of animals. 



