580 INDEX 



Kligler, I. J., Conn, H. J., Chairman, Atkins, K. N., Norton, J. F., and 

 Harmon, G. E. Progress report for 1920 committee on bacteriological 

 technic 135 



Leguminosae, Notes on the flagellation of the nodule bacteria of 239 



Macy, Harold. Chart of the families and genera of the bacteria 575 



Main lines, The, of the natural bacterial system 263 



Mannitol-producing, The, organisms in silage 431 



Method for the intravenous injection of guinea-pigs 249 



Methylene blue. Chemical criteria of anaerobiosis with special reference to. . 1 

 Milk, Powdered litmus. A product of constant quality and color which 



can be made in any laboratory 43 



Monfort, W. F., and Perry, Margaret C. Some atypical colon-aerogenes 



forms isolated from natural waters 53 



Morishima, Kan-Ichiro. Variations in typhoid bacilli 275 



Nature, The, of hemolysins 89 



, The, of toxin. The antigens of Corynebacterium diphtheriae and Bacil- 

 lus megatherium and their relation to toxin 103 



New, A, modification and application of the Gram stain 395 



Nitrite ferment. On nitrification. IV. The carbon and nitrogen relations 



of the 479 



Nitrification, On. IV. The carbon and nitrogen relations of the nitrite 



ferment 479 



Nodule bacteria of Leguminosae, Notes on the flagellation of the 239 



Norton, J. F., Conn, H. J., Chairman, Atkins, K. N., Kligler, I. J., and 

 Harmon, G. E. Progress report for 1920 committee on bacteriological 



technic 135 



, and Sawyer, Mary V. Indol production by bacteria 471 



Note on the indol test in tryptophane solution 85 



Notes on the flagellation of the nodule bacteria of Leguminosae 239 



On decreasing the exposure necessary for the gelatin determination 571 



nitrification. IV. The carbon and nitrogen relations of the nitrite 



ferment 479 



the growth and the proteolytic enzymes of certain anaerobes 419 



Organisms, The mannitol-producing, in silage 431 



Orla-Jensen, S. The main lines of the natural bacterial system 263 



Palmer, G. A., and Rush, J. E. On decreasing the exposure necessary for 

 the gelatin determination 571 



Pathogenic anaerobes, Studies in, II. Principles concerning the isolation 

 of anaerobes 445 



, Studies in, IV. Suggestions concerning a rational basis for the 



classification of the anaerobic bacteria 521 



Pepton, The effect of, upon the production of tetanus toxin 407 



