THE CULTIVATION OF MICRO-ORGANISMS 



I2 7 



p IG 53 Bottle for tube cultures. (After Novy.) 



FIG. 54. Apparatus for Petri dishes or tubes FIG. 55. Apparatus for plates 



gasorpyrogallate method. (After Novy.) or tubes gas, pyrogallate or vac- 

 uum method. (After Novy.) 



