262 OBGANISMS RESEMBLING THE CHOLERA SPIRILLUM. 



the liquefied gelatin is clouded in this culture, in the cholera 

 culture it is perfectly clear, the culture having settled to the 

 bottom of the liquefaction (Fig. 115). 



The growth on agar is very luxuriant. It forms a heavy 

 slimy whitish membrane which soon covers the entire surface 

 of the medium. On potato an extensive moist grayish-yellow 



FIG. 115. 



Stab culture of the Finkler-Prior bacillus in gelatin, at 18 to 20 C. : a, after 

 nnetJ-sfx^ h UrS; C> after sevent y- two hours ; d > aft er 



coating is formed. The growth on potato develops at the 

 room temperature, whereas the cholera spirillum will not 

 develop on potato at a temperature lower than that of the 

 body. Even then the growth is very slight and of a brownish 

 color. 



Blood-serum is liquefied rapidly. The growth in milk is 



