- 20 — 



but its action is not felt at any distance 

 except very rarely. As a rule its propaga- 

 tion is not to be feared, except on the 

 very spot where the subject expels it 

 and its vitality is attenuated, and rapidly 

 disappears, destroyed by the very surro- 

 undings. 



Exposed to the open air and to the 

 action of solar light, the virulence and 

 power of contamination of the bacillus 

 notably diminishes. The mucus sputa 

 the uterine issues, and all other excre- 

 tions full of bacilli, are sterilized by dis- 

 secation, by the action of solar light and 

 by spontaneous pulverization of the me- 

 dia. This opinion which is fairly genera!, 

 has been confirmed by the eminent Pro- 

 fessor Vallee in a series of conferences 

 given in Paris in 190U. 



Referring to this special point Profes- 

 sor Vallee said. 



«We have still to tind out what beco- 

 " mes of the bacilli which come from 

 - the system of the tuberculous subject 



