IV CONTENTS 



A Method for Counting the Number of Fungi in the Soil. Seknan A. 



Waksman 339 



Studies on Thermophilic Bacteria. I. Aerobic Thermophilic Bacteria from 



Water. Lethe E. Morrison and Fred W. Tanner 343 



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



Green 367 



No . 4, JuLT, 1922 



Quantitative Determinations of Some of the Biochemical Changes Produced 

 by a Saprophytic Anaerobe. L. D. Bushnell 373 



The Proportion of Viable Bacteria in Young Cultures with Especial Refer- 

 ence to the Technique Employed in Counting. G. S. Wilson 405 



A Method of Detecting Rennet Production by Bacteria. H. J. Conn 447 



No. 5, September, 1922 



The Relation of Vitamines to the Growth of a Streptococcus. S. Henry 



Ayers and Courtland S. Mudge 449 



Salt Effects in Bacterial Growth. II. The Growth of Bad. Colt in Relation 



to H-Ion Concentration. James M. Sherman and George E. Holm. . . . 465 

 A Note on the Morphology of Bacteria Sjonbiotic in the Tissues of Higher 



Organisms. Ivan E. Wallin 471 



Observations on the Properties of Bacteriolysants (D'Herelle's Phenomenon, 



Bacteriophage, Bacteriolytic Agent, etc.). Part I. Wilburt C. Davison. 475 

 Observations on the Nature of Bacteriolysants (D'Herelle's Phenomenon, 



Bacteriophage, Bacteriolytic Agent, etc.). Part II. Wilburt C. 



Davison 491 



Clostridium Pulrificum (B. Putrificus Bienstock), A Distinct Species. George 



F. Reddish and Leo F. Rettger 505 



Transparent Milk as a Bacteriological Medium. J. Howard Brown and 



Paul E. Howe 511 



The Use of Agar Slants in Detecting Ammonia Production and its Relation 



to the Reduction of Nitrates. G. J. Hucker and W. A. Wall 515 



Methods of Pure Culture Study. Report of Committee on Bacteriological 



Technic. H. J. Conn, chairman 519 



An Investigation of American Gentian Violets. Report of Committee on 



Bacteriological Technic. Prepared by H. J. Conn, Chairman 529 



No. 6, November, 1922 



Method for the Isolation of Bacteria in Pure Culture from Single Cells and 



Procedure for the Direct Tracing of Bacterial Growth on a Solid Medium. 



J. Prskov 537 



Bacterial Autolysis. W. S. Sturges and L. F. Rettger 551 



Bacillus Ilemoglobinophilus canis (Friedberger) {Hemophilus cants emend). 



T. M. Rivers 579 



Salt Effects in Bacterial Growth. III. Salt Effects in Relation to the Lag 



Period and Velocity of Growth. J. M. Sherman, G. E. Holm and W. R. 



Albus 583 



