IV CONTENTS 



A Correlation Study of the Colon-Aerogenes Group of Bacteria, with 

 Special Reference to the Organisms Occurring in the Soil. Chen Chong 

 Chen and Leo F. Rettger 253 



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



The Relative Effect of Phosphate-Acetate and of Phosphate-Phthalate 

 Buffer Mixtures upon the Growth of Endothia parasitica on Malt Extract 

 and Corn Meal Media. M. R. Meacham, J. H. Hopfield and S. F. Acree. 305 



A Method of Determining the Relative Toxicity of Sodium, Potassium, 

 Lithium, and Other Ions Toward Endothia parasitica: Data on Sodium 

 Chloride. M. R. Meacham, J. H. Hopfield and S. F. Acree 309 



Report of Committee on Descriptive Chart. Part II. Report of Progress 

 during 1919. H. J. Conn, Chairman, H. A. Harding, I. J. Kligler, W. D. 

 Frost, M. J. Prucha, and K. N. Atkins 315 



Report of Committee on Descriptive Chart. Part III. A Modification of 

 the Gram Stain. Kenneth N. Atkins 321 



No. 4, July, 1920 



Further Studies on the Growth Cycle of Aztobacter. Dan H. Jones 325 



The Diagnosis of Anthrax from Putrefying Animal Tissues. W. A. Hagan. 343 



Bacterial Decomposition of Salmon. Albert C. Hunter 353 



The Filtration of Colloidal Substances through Bacteria-Retaining Filters. 



W. S. Gochenour and Hubert Bunyea 363 



Notes on the Fusiform Bacilli of Vincent's Angina. S. R. Gifford 365 



A Highly Resistant Thermophilic Organism. P. J. Donk 373 



The Biology of Clostridium Welchii. J. Russell Esty 375 



A Note on the Viability of Meningococci on Yeast Agar Medium. Frederick 



Eberson 431 



The Use of Agar Slants in Detecting Fermentation. H. J. Conn and G. J. 



Hucker 433 



No. 5, September, 1920 



The Fate of Bacteria of the Colon-Typhoid Group on Carbohydrate Media. 

 O. Ishii 437 



"Color Standards" for the Colorimetric Measurement of H-Ion Concen- 

 tration pH 1.2 to pH 9.8. Leon S. Medalia 441 



A Study of the Action of Eight Strains of Bad. Abortivo'-Equinus on Certain 

 of the Carbohydrates. C. P. Fitch and W. A. Billings 469 



Bacteriologic Peptone in Relation to the Production of Diphtheria Toxin 

 and Antitoxin. Lewis Davis 477 



The Nomenclature of the Actinomycetaceae (Addenda). R. S. Breed and 



H. J. Conn 489 



Preliminary Note on the Use of Some Mixed Buffer Materials for Regulat- 

 ing the Hydrogen Ion Concentrations of Culture Media and of Standard 

 Buffer Solutions. M. R. Meacham, J. H. Hopfield, and S. F. Acree. ... 491 



A Mutating, Mucoid Paratyphoidbacillus Isolated from the Urine of a 

 Carrier. Th. Thj0tta and Odd Kinck Eide 501 



Bacteriologic Studies in Chronic Arthritis and Chorea. J. H. Richards... 511 



