JOURNAL OF BACTERIOLOGY 



OFFICIAL ORGAN OF THE SOCIETY OF AMERICAN BACTKIIIOLOGISTS 



DEVOTED TO THE ADVANCEMENT AND DIS- 

 SEMINATION OF KNOWLEDGE IN REGARD TO 

 THE BACTERIA AND OTHER MICRO-ORGANISMS 



Eililortal lionrd 



EditOT^n-ChieJ 



C.-E. A. WINSLOW 



Yale Medical School. New lUven, Conn. 



A. I'arker Hitchbns 



Lore A. Rooer^, Ex ofBcio 



C. C. Hass 

 R. E. Bdchanan 

 P. F. Clark 

 F. P. Gay 



Adinsory Editors 



F P. GORHAM 



F. C. Harrison 

 E. O. .Jordan 



C. R. LiPMAN 



C. E. Marshall 

 V. A. Moore 

 L. F. Rettoer 

 L. A. Rogers 



M. J. ROSBNA 



A. W. Williams 

 II. Zinsser 



CONTENTS 



J. Howard Mueller. Studies on Cultural Requiroments of Bacteria. I 309 



J. Howard Mueller. Studies on Cultural Roquirumonts of Bacteria. II 325 



Selmax a. W.^ksmax. A Method for Counting the Number of Fungi in the Soil 339 



Lethe E. Morrison and Fred W. Tanner. Studies on Thermophilic Bacteria. I. 



.\erobic Thermophilic Bacteria from Water 34o 



Robert G. Greex. An Apparatus for the Rapid Measurement of Surface Tension .. .. 367 



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

 Abstracts of Bacteriology, published monthly by the Williams & Wilkins Company, undei 

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

 furnished in sets consisting of Volumes I, II, III and IV. Price per set, net, postpaid, $24.00, 

 United States, Mexico, Cuba ; $2.5.00, Canada; $2(5.00, other countries. Subscriptions are in 

 order for Volume V, 1921. Price, per volume, $5.00, United States, Mexico, Cuba; $5.25, 

 Canada; $5.50. other countries. 



