486 



JAMES M. SHEKMAN 



Lactose agar was used in all of the tests herein reported, but 

 from the results of a number of comparisons it may be said that 

 glucose is apparently just as efficient as is lactose, both as to 

 number and size of colonies. According to the work of Heine- 

 mann and Glenn" glucose and lactose agars are of equal value 



(CultureB'i) 



Fig. 2. Same as figure 1 except a different strain of B. lactis-acidi was used. 



for the quantitative bacterial analysis of milk, and since glu- 

 cose is cheaper it should, perhaps, be recommended as the stand- 

 ard for routine work. A limited number of trials have also 



* Jour. Infect. Dis., 5: 412-420. 



