EXPERIMENT STATION BULLETINS. 



487 



At this point, it ini<>lit he well to note some of tlie characteristics of 

 the lactic organisms nsed in the following- exi)erin)ents. Bact. acidl 

 lactici, Huepi»e, Bttct. acidl lactici, Novv, Bact. acidl kicticl, No. 1, and 

 Bact. acldi lactici, No. 2, produced gasi and an offensive odor in ordinary 

 broth; no gas or odor was i)rodnced by Strcpt. lacticus and Bact. lactls 

 acidl, Harding. All the above microorganisms produced acid in litmus 

 milk and eventually cni-ded it, taking from three to eight days for this 

 to be accoin])lished. The first four lactics mentioned, grew abundantly 

 on agar; Bact. acidl lactiol, Novy, and Bact. acidl lactici, No. 1 were 

 motile. 



TABLE III. — Differential Counts on Sheep-Bile and Calcium-Carbonate Agar Using Dif- 

 ferent Lactic Bacteria. 



O. A. = ORDINARY AGAR; S. B. A. = SHEEP-BILE AGAR; C. C. A. = CALCIUM-CARBON- 

 ATE AGAR. 



All of the lactic bacteria in Table III grew vigorously on the litmus 

 lactose bile agar, some producing so much acid that the typhoid colonies 

 were colored red also. 



In every case, higher counts for B. ti/pJiosiis were obtained on the cal- 

 cium-carbonate agar than upon the bile agar and in nearly every case 

 greater numbers of lactics were found upon the sheep-bile agar, which 

 results are the reverse of those summarized in Table II. 



