568 J. HOWARD BROWN 



REFERENCES 



Berman, N., and Rettger, L. F. 1918 The influence of carbohydrate on the 

 nitrogen metabolism of bacteria. Jour. Bact., 5, 389. 



BoviE, W. T. 1915 A direct reading potentiometer for measuring and recording 

 both the actual and total reaction of solutions. Jour. Med. Res., 33, 

 295. 



Bronfenbrenner, J., AND ScHLESiNGER, M. J. 1918 Carbohydrate fermen- 

 tation by bacteria as influenced by the composition of the medium. 

 Proc. Soc. Exp. Biol, and Med., 16, 44. 



Clark, W. M. 1915a The final hydrogen ion concentrations of cultures of 

 Bacillus coll. Jour. Biol. Chem., 22, 87. 



Clark, W. M. 1915b The reaction of bacteriologic culture media. Jour. Inf. 

 Dis., 17,109. 



Clark, W. M., and Ltjbs, H. A. 1917 The colorimetric determination of hydro- 

 gen ion concentration and its applications in bacteriology. Jour. 

 Bact., 2, 1. 



Conn, H. J., Harding, H. A., Kligler, I. J., Frost, W. D., Prucha, H. J., and 

 Atkins K. N. 1919 Methods of pure culture study. Progress report 

 for 1918 of the committee on the descriptive chart of the Society of 

 American Bacteriologists. Jour. Bact., 4, 128-129. 



HuRwiTz, S. H., Meyer, K. F., and Ostenberg, Z. 1915 On a colorimetric 

 method of adjusting bacteriological culture media to any optimum 

 hydrogen ion concentration. Proc. Soc. Exp. Biol, and Med., 13,24. 



Jones, F. S. 1920 Influence of variations of media on acid production by 

 streptococci. Jour. Exp. Med., 32, 273. 



Jones, H. M 1920a Effect of carbohydrate on amino acid utilization of certain 

 bacteria. Jour. Inf. Dis., 27, 169. 



Jones, H. M. 1920b Factors influencing final hydrogen ion concentration in 

 bacterial cultures with special reference to streptococci. Jour. Inf. 

 Dis., 26, 160. 



Kligler, I. J. 1916 Some regulating factors in bacterial metabolism. Jour. 

 Bact., 1, 663. 



Washburn, E. W. 1910 The significance of the term alkalinity in water analysis 

 and the determination of alkalinity by means of indicators. Proc. 

 Second Meeting Illinois Water Supply Assn., p. 93. 



Wolf, C. G. L. 1920 The influence of the reaction of media and of the presence 

 of buffer salts on the metabolism of bacteria. Brit. Jour. Exp. Path. 

 1, 288. 



