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-ChieJ 



C.-E. A. WINSLOW 



Yale Medical School, New Haven, Conn. 



Dr. Charles Krumwiede, Jr., Ex officio 



C. C. Bass" 

 R. E. Buchanan 

 P. F. Clark 

 F. P. Gay 



F. P. GORHAM 



P. C. Harrison 



Advisory Editors 



H. W. Hill 

 E. O. Jordan 

 A. I. Kendall 

 C. B. Lipman 

 C. E. Marshall 



V. A. Moore 

 M. E.Penington 

 F. B. Phelps 

 L. F. Rettger 

 L. A. Rogers 



M. J. Rosenau 

 W. T. Sedgwick 

 F. L. Stevens 

 A. W. Williams 

 H. Zinsser 



CONTENTS 



C.-E. A. Winslow, Chairman, Jean Broadhurst, R. E. Buchanan, Charles Krum- 

 wiede, Jr., L. A. Rogers, and G. H. Smith. The Families and Genera of the 

 Bacteria. Final Report of the Committee of the Society of American Bacteriol- 

 ogists on Characterization and Classification of Bacterial Types 191 



John T. Myers. The Production of Hydrogen Sulphide by Bacteria 231 



Chen Chong Chen and Leo F. Rettger. A Correlation Study of the Colon-Aero- 

 genes Group of Bacteria, with Special Reference to the Organisms Occurring in 

 the Soil ! 253 



G. E. Burget. Note on the Flora of the Stomach 299 



M. R. Meacham, J. H. Hopfield and S. F. Acree. The Relative Effect of Phos- 

 phate-Acetate and of Phosphate-Phthalate Buffer Mixtures upon the Growth of 

 Endothia Parasitica on Malt Extract and Cora Meal Media 305 



M. R. Meacham, J. H. Hopfield and S. F. Acree. A Method of Determining the 

 Relative Toxicity of Sodium, Potassium, Lithium, and Other Ions Toward Endo- 

 thia Parasitica: Data on Sodium Chloride 309 



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

 and K. N. Atkins. Report of Committee on Descriptive Chart. Part II. Report 

 of Progress During 1919 315 



Kenneth N. Atkins. Report of Committee on Descriptive Chart. Part III. A Mod- 

 ification of the Gram Stain 321 



Abstracts of American and foreign bacteriological literature appear in a separate journal, 

 Abstracts of Bacteriology, published bi-monthly by the Williams & Wilkins Company, under 

 the editorial direction of the Society of American Bacteriologists. Back volumes can be 

 furnished in sets consisting of Volumes I, II and III. Price per set, net, postpaid, $18.00, 

 United States, Mexico, Cuba; $18.75, Canada; $19.50, other oountries. Subscriptions are in 

 order for Volume IV, 1920. Price, per volume, $5.00, United States, Mexico, Cuba; $5.25, 

 Canada; $5.50, other countries. 



