624 INDEX 



Soil, Microorganisms concerned in the oxidation of sulfur in the. IV. A 



solid medium for the isolation and cultivation of Thiobacillus thiooxidans 605 



, . V. Bacteria oxidizing sulfur 



under acid and alkaline conditions 609 



Sources, The, and characteristics of the bacteria in decomposing salmon. . . 85 



Species, A distinct, Closlridium putrificiim (B. ■pulrificus Bienstock) 505 



Spore-bearing bacteria, Influence of vacuiun upon growth of some aerobic . . 283 



Stain, Gram, Notes on the, with description of a new method 159 



Staining milk by the Breed method, The use of domestic methylene blue in. 307 

 Stains, American. An investigation of. Report of committee on bacteri- 

 ological technic 127 



Streptococcus, The relation of vitamines to the growth of a 449 



Studies in pathogenic anaerobes. V. Certain genera of the clostridiaceae. . 1 

 on cultural requirements of bacteria. 1 309 



on the biology of lactic acid bacteria: a summary of personal investi- 

 gations 271 



on thermophilic bacteria I. Aerobic thermophilic bacteria from water. 343 



upon agglutination in the colon-typhoid group of bacilli 39 



Study, A, of spontaneous agglutination in the colon-typhoid group of bacilli. 71 



Sturges, William S. and Rettger, Leo F. Bacterial autolysis £51 



Substitution of brom-thymol-blue for litmus in routine laboratory work. . . 301 

 Sulfur in the soil. Microorganisms concerned in the oxidation of. I. In- 

 troductory 231 



Sulfur in the soil, Microorganisms concerned in the oxidation of. II. Thio- 

 bacillus thiooxidans, a new sulfur-oxidizing organism isolated from the 



soil 239 



, — . IV. A solid medium for 



the isolation and cultivation of Thiobacillus Ihiooxidaiis 605 



. , . V. Bacteria oxidizing 



sulfur under acid and alkaline conditions 609 



Sulfur-oxidizing organism isolated from the soil, Thiobacillus thiooxidans, 

 a new. Microorganisms concerned in the oxidation of sulfur in the 



soil, II 239 



Sulfur under acid and alkaline conditions, Bacteria oxidizing. Micro- 

 organisms concerned in the oxidation of sulfur in the soil, V 609 



Surface tension. An apparatus for the rapid measurement of 367 



Tanner, Fred W. and Morrison, Lethe E. Studies on thermophilic bacteria. 



I. Aerobic thermophilic bacteria from water 343 



Technic, bacteriological. Report of committee on. An investigation of 



American gentian violets 529 



, , , . An investigation of American stains 127 



, , . Methods of pure culture study 519 



Technique employed in counting, The proportion of viable bacteria in j'oung 



cultures with especial reference to the 405 



Temperature and hj-drogen ion concentration. The effects of, upon the 



viability of Bad. coli and Bact. typhosum in water. Disinfection studies. 183 



