INDEX OF SUBJECTS. 



723 



Soil, temperature relations, 232 



transformation of nitrogen com- 

 pounds, 253 

 organic acids, 250 

 reactions of, 243 



Source of organic acids in soil, 250 * 

 Specific gravity of bacteria, 89 

 Sporogony, 73 

 Stable, air of, 301, 302 

 Starch, fermentation of, 463 



for manufacture, 463 



raw materials of, 463 

 Sterigma, 15 

 Sterilization, of corn, 390 



economic importance of, 388 



of fish, 389 



of fruits, 390 



of meat, 289 



of peas, 390 

 Stomach, 546 

 Straining of milk, 315 

 Streptococcic infections, serum for, 484 

 Sugar, manufacture, 463 

 Sulphur cycle, 127 



in soil, 245, 288 

 Susceptibility, 543 



definition, 541 



familial, 544 



general, 541 



hyper, 541 



individual, 544 



natural, 544 



racial, 544 



Suspensions for agglutination tests, 488 

 Symbiosis, 181 

 Symbiotic nitrogen fixation, cultures in, 28 2 



development of organisms, 276 



entrance of organisms, 276 



environmental relations, 278 



history of, 278 



inoculation, methods of, 280 



legume earth for inoculation, 282 



mechanism of, 277 



physiological efficiency, 277 



resistance of plants, 279 



specialization, 273 



variations, 278 



Symptomatic anthrax, vaccine 472 

 Synthetic media, 99 



TAINTS of milk, 292 

 Tanks, anaerobic, 224 



septic, 224 

 Tanning, 465 

 Temperature, cardinal points, significance 



f> J SS 

 endpoints of fermentation, 157 



Temperature, influence on germ content 



of milk, 318 

 on germ content of water, 201 



maximum, 155 



minimum, 154 



optimum, 153 



resistance of spores, 160 



of soil, 232, 233 



thermal death-point, 159 

 Tetanus, antitoxin, 483 

 Theories of nitrogen-fixation, 268 

 Thermal death -point, 159 

 Tobacco, 464 

 Toxic proteins, 122, 417 

 Toxins, 122, 123 



cyto-, 564 



diphtheria, 122, 123 



endo-, 535 



leucocyte-, 564 



neutralization, 557 



soluble, 534 



tetanus, 122, 123 



unit of, 482 

 Toxoid, true, 559 

 Toxon, 559 



Toxophile receptors, 555 

 Toxophore group, 555 

 Transformation of ammonia, 266 



nitrates, 266 



nitrogen in soil, 253 



organic acids in soil, 250 



peptone, 266 

 Trimethylamin, 114 

 Tryptophan, 114 

 Tuberculin, Koch's old, 485 



Koch's other (T.R., B.E., etc.), 487 

 Tuberculosis, vaccine, 485 

 Ty rosin, 114 



UDDER of cow, 297 



bacteria from quarters, 299 

 from entire udder, 298 



Bact. lactis acidi in, 299 



diseased, 299 



exterior, 300 



healthy, 297 



interior, 297 



wiping of, 304 

 Ultramicroscopic viruses, 79 

 Urea, 93, 117 

 Uric acid, 117 



VACCINE, anthrax, 476 

 Asiatic cholera, 477 

 bacterial, 418 

 blackleg, 472 

 bubonic plague, 478 



