PLATE V. 



FIG. i. Bacillus pyocyaneus. 



Bacterium ceruginosum. 

 Bacillus fluorescens. 



Tube inoculated from pus. The gelatine was liquefied 

 and appeared green by transmitted and orange by 

 reflected light. 



FIG. 2. Sarcina lutea. 



Tube inoculated from a colony which occurred on potato 

 exposed to the air. The gelatine was partially 

 liquefied, and a canary-yellow growth had subsided 

 to the bottom of the liquefied layer. 



FIG. 3. Bacillus anthracis. 



Tube inoculated from the blood of a mouse which had 

 died of anthrax. The typical growth which occurs 

 in a few days is shown in Fig. 107. In this figure 

 the appearance after three weeks is represented. 

 The gelatine was completely liquefied, and a floc- 

 culent mass had subsided to the bottom of the 

 tube. 



