MAX LEVINE 



1.0 



0.8 



0.6 



the curves for the different types run almost parallel and very close 

 together. 



2. That there is no correlation between the amount of acid formed 

 from the carbohydrates, the alcohols, and the glucosid studied, and the 

 animal source, is apparent from Plot III, in which a parallelism simi- 

 lar to that in Plot II is observed. The high average of acid-forma- 

 tion in sucrose among the horse strains is due to the presence among 

 them of a few high-acid-producing cultures, not to any ability of horse 

 strains, as a whole, to yield more acid from sucrose. This has been 

 previously indicated in Table 6. 



3. In a general way, the Voges-Proskauer-positive strains isolated 

 from sewage form less acid from the monosaccharids, but more acid 

 from the more complex carbohydrates, etc., (except lactose) than the 

 Voges-Proskauer-negative strains. That this difference is not peculiar 

 to the strains isolated for this study, but is characteristic of the Voges- 

 Proskauer-positive and -negative strains in general, is indicated by the 



