INDEX 601 



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

 M. J., 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 



Further studies on the growth cycle of azotobacter 325 



Fusiform bacilli, Notes on the, of Vincent's angina 365 



Genera, The families and, of the bacteria. Final report of the Committee 

 of the Society of American Bacteriologists on Characterization and 



Classification of Bacterial Types 191 



Germicidal action in milk. Bacterial inhibition. 1 527 



Gifford, S. R. Notes on the fusiform bacilli of Vincent's angina 365 



Gochenour, W. S., and Bunyea, Hubert. The filtration of colloidal sub- 

 stances through bacteria-retaining filters 363 



Gram stain, A modification of. Report of Committee on Descriptive 



Chart. Part III 321 



Growth cycle of azotobacter, Further studies on the 325 



Hagan, W. A. The diagnosis of anthrax from putrefying animal tissues. . . 343 



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

 M. J., 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 



H-Ion concentration, "Color Standards" for the colorimetric measurement 

 of, pH 1.2 to pH 9.8 441 



Highly, A, resistant thermophilic organism 373 



Hopfield, J. H., Meacham, M. R., and Acree, S. F. A method of deter- 

 mining the relative toxicity of sodium, potassium, lithium, and other 

 ions toward Endothia parasitica: Data on sodium chloride 3G9 



, , . Preliminary note on the use of some mixed buffer ma- 

 terials for regulating the hydrogen ion concentrations of culture media 

 and of standard buffer solutions 491 



, f . The relative effect of phosphate-acetate and of phos- 



phate-phthalate buffer mixtures upon the growth of Endothia -parasitica 

 on malt extract and corn meal media 305 



Hucker, G. J., and Conn, H. J. The use of agar slants in detecting fermen- 

 tation 433 



Hunter, Albert C. Bacterial decomposition of salmon 353 



. Bacterial groups in decomposing salmon 543 



Hydrogen ion concentrations, Preliminary note on the use of some mixed 

 buffer materials for regulating the, of culture media and of standard 

 buffer solutions 491 



sulphide, The production of, by bacteria 231 



Influence, The, of various chemical and physical agencies upon Bacillus 



botulinus and its spores. I. Resistance to salt 553 



