INDEX 711 



American bacteriological literature — continued 

 Bacteriology oj soils. 



Inoculation and incubation of soil fungi, The. Nicholas Kopeloff 557 



Nitro cultures and their commercial application. F. C. Harrison 456 



Occurrence of bacteria in frozen soil, The. E. C. Harder 555 



Oxidation of sulfur in soils as a means of increasing the availability of 

 mineral phosphates, The. J. G. Lipman, H. C. McLean and H. C. 



Lint 678 



Preliminary experiments on some effects of leaching on the soil flora. 



C. B. Lipman and L. W. Fowler 553 



investigations in comparison of field with laboratory experiments 



in soil bacteriology. G. P. Koch 675 



Quantitative method for the estimation of bacteria in soils. R. C. Cook 554 

 Relation between certain bacterial activities in soils and their crop- 

 producing power. Percy Edgar Browne 124 



of carbon bisulphid to soil organisms and plant growth. E. B. 



Fred 361 



of green manures to the failure of certain seedlings. E. B. Fred. . . 361 



Soil fungi and their activities. S. A. Waksman 679 



Some factors influencing the longevity of soil micro5rganisms subjected 

 to desiccation with special reference to soil solution. Ward Gilt- 



ner and H. Virginia Langworthy 123 



factors that influence nitrate formation in acid soils. E. B. Fred 



and E. J. Graul 558 



Sources of error in soil bacteriological analysis. H. C. Lint and D. A. 



Coleman 675 



Stimulating influence of arsenic upon the nitrogen-fixing organisms of 



the soil. J. E. Greaves 554 



Studies in sulfofication. P. E. Brown and H. W. Johnson 553 



on soil protozoa. Selman A. Waksman 561 



on the activity of soil protozoa. G. P. Koch 679 



on the decomposition of cellulose in soils. I. G. McBeth 557 



Variation in nodule formation. L. T. Leonard 456 



Yield and nitrogen content of soy beans as aff'ected by inoculation, The. 



J. G. Lipman and A. W. Blair 677 



Bacteriology of water and sewage. 



Activated sludge process of sewage treatment. The. G. J. Fowler 251 



Air diffusers tested at Milwaukee (Wis.) sewage plant. T. Chalk- 

 ley Halton 125 



Bacteria in commercial bottled waters. Maud Mason Obst 564 



Bacterial counts in water examination. J. Race 564 



Confirmatory tests for B. coli in routine water examinations. W. H. 



Frost 565 



Copper sulphate treatment of St. Paul (Minn.) water supplies. N. L. 



Huff and G. O. House 458 



Electrical treatment of water, The. T. A. Starkey 363 



Experiences in the application of the activated sludge process to Chi- 

 cago stockyard sewage. Arthur Lederer 457 



