CONTENTS 



No. 1, January, 1921 



Chemical Criteria of Anaerobiosis with Special Reference to Methylene 



Blue. Ivan C. Hall 1 



Powdered Litmus Milk. A Product of Constant Quality and Color which 



Can be Made in Any Laboratory. Herbert W. Hamilton 43 



Bacteria Concerned in the Ripening of Corn Silage. P. G. Heineman and 



Charles R. Hixson 45 



Some Atj'pical Colon-Aerogenes Forms Isolated from Natural Waters. 



Margaret C. Perry and W. F. Monfort 53 



Botulism in Cattle. Robert Graham and Herman R. Schwarze 69 



Note on the Indol Test in Tryptophane Solution. Chr. Barthel 85 



The Nature of Hemolysins. J. T. Connell and L. E. Holly 89 



The Nature of Toxin. The Antigens of Corynebacterium diphtheriae and 

 Bacillus megatherium and their Relation to Toxin. C. C. Warden, 



J. T. Connell and L. E. Holly 103 



The Gas Production of Streptococcus Kefir. James M. Sherman 127 



The Importance of Preserving the Original Types of Newly Described Spe- 

 cies of Bacteria. C.-E. A. Winslow 133 



No. 2, March, 1921 



Progress Report for 1920 Committee on Bacteriological Technic. H. J. Conn, 



Chairman, K. N. Atkins, I. J. Kligler, J. F. Norton, and G. E. Harmon. 135 

 A Study of the Variations in Hydrogen-Ion Concentration of Broth Media, 



Laurence F. Foster and Samuel B. Randall 143 



The Relation of Hydrogen-Ion Concentration to the Growth, Viability and 



Fermentative Activity of Streptococcus hemolyticus. Laurence F. 



Foster 161 



The Biochemistry of Streptococcus hemolyticus. Laurence F. Foster 211 



Notes on the Flagellation of the Nodule Bacteria of Leguminosae. Ivan V. 



Shunk 239 



Method for the Intravenous Injection of Guinea-Pigs. George B. Roth... 249 

 Rose Bengal as a General Bacterial Stain. H. J. Conn 253 



No. 3, May, 1921 



William Thompson Sedgwick, 1855-1921 255 



The Main Lines of the Natural Bacterial System. S. Orla-Jensen 263 



Variations in Typhoid Bacilli. Kan-Ichiro Morishima 275 



Solid Culture Media with a Wide Range of Hydrogen or Hydroxyl Ion Con- 

 centration. Frederick A. Wolf and I. V. Shunk 325 



Studies on Azotobacter Chroococcum Beij. Augusto Bonazzi 331 



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