INDEX 603 



Mudge, Courtland S., and Ayers, S. Henry. Milk-powder agar for the 



determination of bacteria in milk 565 



, Ayers, S. Henry, and Rupp, Philip. The use of washed agar in cul- 

 ture media 589 



Mutating, A, mucoid paratyphoid bacillus isolated from the urine of a 



carrier 501 



Myers, John T. The production of hydrogen sulphide by bacteria 231 



Nitrogen metabolism. Studies in the metabolism of actinomycetes. III... 1 



Nomenclature, The, of the actinomycetaceae (Addenda) 489 



Normington, Ruth, and Wyant, Zae Northrup. The influence of various 



chemical and physical agencies upon Bacillus botulinus and its spores. 



I. Resistance to salt 553 



Note, A, on the viability of meningococci on yeast agar medium 431 



Note on the flora of the stomach 299 



Notes on the classification of the white and orange staphylococci 145 



Notes on the fusiform bacilli of Vincent's angina 365 



Nutrient media, Bouillon cubes as a substitute for beef extract or meat in. . 189 



Oils, The sterilization of, by means of ultra violet rays 49 



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 



On the bacillus of Morgan No. 1 — a meta-colon-bacillus 67 



Paratyphoidbacillus, A mutating, mucoid, isolated from the urine of a 

 carrier 501 



Parsons, Elizabeth, I., Winslow, C.-E. A., and Rothberg, William. Notes 



on the classification of the white and orange staphylococci 145 



Peptone, Bacteriologic, in relation to the production of diphtheria toxin 



and antitoxin 477 



Phenolsulfonphthalein salts, A spectrophotometric study of the "salt 



effects" of phosphates upon the color of, and some biological applications 169 



Phosphate-acetate, The relative effect of, and of phosphate-phthalate 

 buffer mixtures upon the growth of Endothia parasitica on malt ex- 

 tract and corn meal media 305 



Phosphates, A spectrophotometric study of the "salt effects" of, upon the 



color of phenolsulfonphthalein salts and some biological applications. . 169 



Preliminary note on the use of some mixed buffer materials for regulating 

 the hydrogen ion concentrations of culture media and of standard 

 buffer solutions 491 



Prescott, Samuel C. Some bacteriological aspects of dehydration 109 



Production, The, of hydrogen sulphide by bacteria 231 



Prucha, M. J., Conn, H. J., Chairman, Harding, H. A., Kligler, I. J., Frost, 

 W. D., and Atkins, K. N. Report of the Committee on the Descriptive 

 Chart for 1919 127 



, , — — . Report of Committee on Descriptive Chart. Part II. 



Report of progress during 1919 315 



, and Tanner, F. W. Time saving bacteriological apparatus 559 



