GROWTH OF BACTERIA IN PROTEIN-FREE PRODUCTS 



225 



All of these media contained 1.5 per cent agar, and were faintly 

 alkaline to litmus. They were all inoculated at the same time 

 and from the same culture tube. The results are shown in the 

 following table. 



B. diphtheriae (A) 



B. diphtheriae (Y. M. S.)- • • 



B. diphtheriae (no. 8) 



B. diphtheriae (no. 8m) 



B. pseudo diphtheriae 



B. abortus (B) 



B. pertussis 



M. melitensis 



M. catarrhalis 



Gonococcus (287) 



Pneumococcus (m) 



Pneumococcus (697) 



Meningococcus (M) 



Meningococcus (200) 



Streptococcus (urine) 



Streptococcus pyogenes (310) 

 Streptococcus pyogenes (347) 



Streptococcus (I) 



Streptococcus (IV) 



Streptococcus (D) 



Starch bacillus (3) 



Starch bacillus (6) 



B. acidophilus 



Staphylococcus aureus (II). 

 Staphylococcus aureus (III) 

 Streptococcus pyogenes (VI) 



The two strains of a so-called ''starch bacillus" were Gram — , 

 spore-forming, starch-digesting organisms, obtained from the 

 intestines of rats fed on a diet of cornstarch. Staphylococcus 

 (II and III) and Streptococcus (strains I, IV, D and VI), had been 

 freshly isolated from the milk of cows suffering from mammitis. 



It is at once evident from the table that the growths on 2 per 



THE JOURNAL OF BACTERIOLOGY, VOL. III. NO. 3 



