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. 



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 



Selman A. Waksman. Studies in the Metabolism of Actinomycetes. III. Nitrogen 

 Metabolism 1 



Selman A. Waksman and Jacob S. Joffe. Studies in the Metabolism of Actinomycetes. 

 IV. Changes in Reaction as a Result of the Growth of Actinomycetes upon Culture 

 Media 31 



Lawrence T. Fairhall and Paul M. Bates. The Sterilization of Oils by Means of 



Ultra Violet Rays 49 



Th. Thj0tta. On the Bacillus of Morgan No. I — A Meta-colon-Bacillus 67 



J. Bronfenbrenner, M. J. Schlesinger and D. Soletskt. On Methods of Isolation 

 and Identification of the Members of the Colon-Typhoid Group of Bacteria. The 



Study of Bactericidal Action of CR Indicator 79 



S. Henry Ayers and Philip Rupp. Extracts of Pure Dry Yeast for Culture Media.. 89 

 Guy W. Clark. A Modified Procedure for the Preparation of Testicular Infusion Agar 99 

 Frank C. Wilson. Description of an Apparatus for Obtaining Samples of Water at 

 Different Depths for Bacteriological Analysis 103 



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 Volume I, 1917 and Volume II, 1918. Price per set, net, 

 postpaid, $10.00, domestic; $11.00, foreign. Subscriptions are in order for Volume III, 1919. 

 Price, per volume, $5.00, domestic; $5.25, Canada; $5.50, elsewhere, 



