130 SYMPTOMATIC ANTHRAX 



using. The powder is dissolved in water, heated for six hours at 

 from 95 to 100 C, and injected into the animal. The number of 

 doses of this vaccine used annually in this country amounts to more 

 than a million and a quarter. This has greatly decreased the loss from 

 this disease. 



In 1911 Foth announced the preparation of a superior vaccine for 

 symptomatic anthrax. Massive cultures are filtered through a hard 

 paper and the filtrate precipitated with alcohol. This precipitate pro- 

 tects both cattle and guinea-pigs, and its strength can be more accur- 

 ately determined than the older vaccines. However, its practical use 

 on a large scale has not yet been demonstrated. 



