VIBRIO METCHNIKOVI. 



487 



The whole growth is so smooth and glisteniug that it 

 has somewhat the appearance of being varnished. 



In' bouillon it quickly causes opacity, with the ulti- 

 mate production of a delicate pellicle upon the surface. 



Fig. 90. 



a h £ d 



stab-culture of mbrio Mekhuikovi in gelatin, at 18° to 20° 0. 



a. After twenty-four hours. B. After forty-eight hours, u. After seventy-two 

 hours, d. After ninety-six hours. 



It causes liquefaction of blood-serum, the liquefied 

 area being covered by a dense, wrinkled pellicle. 



When grown in peptone solution it produces indol 

 and coincidently nitrites, so that the rose-colored reac- 

 tion characteristic of indol is obtained by the addi- 



