35 



THE OBGANISM IS A BACILLUS. 

 THE GELATINE IS LIQUEFIED. 

 THE ORGANISM IS MOTILE. 

 THE COLONIES AEE VIOLET. 



Bacillus violaceus, from water from the Thames and Spree ; motile 

 baoiUi with rovmded ends ; liquefies blood serum. 



Bacillus ianthinus (Zopf), from Chemnitz water. 



Bacillus lividus, from water at Berlin. 



Bacillus cyano-fuscus (Beyerinck), from size, glue and cheese ; 

 bacilli 0'2 to 0'6 /* long ; when grown in i per cent, peptone 

 solution the medium becomes green, changing to blue, then 

 brown and black, finally becoming colourless. 



