BACILLI OF TETANUS. 205 



gelatine a feathery cloudiness is developed along the 

 track of the needle, this spreads far into the gelatine, 

 which becomes gradually liquefied. A similar ap- 

 pearance is to be seen in agar-agar, but as this 

 medium is never so transparent as gelatine, it cannot 

 be so clearly distinguished. 



The Tetanus bacillus is easily stained ; even by 

 Gram's method. 



The greatest care must be taken in all experiments 

 with this bacillus ; all vessels, etc., which are used 

 should be carefully sterilised before^they are put away. 



