JOURNAL OF BACTERIOLOGY 



OFFICIAL ORGAN OF THE SOCIETY OF AMERICAN BACTERIOLOGISTS 



DEVOTED TO THE ADVANCEMENT AND DIS- 

 SEMINATION OF KNOWLEDGE IN REGARD TO 

 THE BACTERIA AND OTHER MICRO-ORGANISMS 



Editorial Board 



A. Parker Hitchens 



Editor-in-Chief 

 C.-E. A. WINSLOW 



Yale Medical School, New Haven, Conn. 



R. E. Buchanan, Ex officio 



C. C. Bass 

 R. E. Buchanan 

 P. F. Clark 

 F. P. Gay 



F. P. GORHAM 



F. C. Harrison 



Advisory Editors 



H. W. Hill 

 E. O. Jordan 

 A. I. Kendall 

 C. B. Lipman 

 C. E. Marshall 



V. A. Moore 

 M. E. Pennington 

 E. B. Phelps 

 L. F. Rettger 

 L. A. Rogers 



M. J. ROSBNAU 



W. T. Sedgwick 

 F. L. Stevens 

 A. W. WiLLiAiia 

 H. Zinsser 



CONTENTS 



N. S. Ferry and H. C Klix. Studies Relative to the Apparent Close Relationship 

 between Bact. pertussis and B. bronchisepticus. II. Complement Fixation Tests, 309 



L. A. Rogers. The Occurrence of Different Types of the Colon-Aerogenes Group in 

 Water 313 



Ivan C. Hall and Lillian Jordan Ellefson. The Elimination of Spurious Presump- 

 tive Tests for B. coli in Water by the Use of Gentian Violet 329 



Ivan C. Hall and Lillian Jordan Ellefson. A Brief Note on the Use of Gentian 

 Violet in Presumptive Tests for B. coli in Milk with Reference to Sporulating 

 Anaerobes 355 



Lawrence A. Kohn and Charles Krumwiede, Jr. On the Value of the Petroleum- 

 Ether Method for the Isolation of B. typhosus from Feces 361 



Nathan Berman and Leo F. Rettger. Bacterial Nutrition: Further Studies on the 

 Utilization of Protein and Non-Protein Nitrogen 367 



Nathan Berman and Leo F. Rettger. The Influence of Carbohydrate on the Nitrogen 

 Metabolism of Bacteria 389 



R. E. Buchanan. Studies in the Classification and Nomenclature of the Bacteria. 



VIII. The Subgroups and Genera of the Actinomycetales 403 



Alfred H. Rahe. The Classification of the Aciduric Bacteria 407 



C. M. Hilliard and Mildred A. Davis. The Germicidal Action of Freezing Tem- 

 peratures upon Bacteria 423 



Abstracts of American and foreign bacteriological literature appears in a separate 

 journal, Abstracts of Bacteriology, published bi-monthly by the Williams & Wilkins Com- 

 pany, under the editorial direction of the Society of American Bacteriologists. Price, $5.00 

 North America; $5.50 elsewhere. 



