INDEX 



Streptococcus, pneumonias, in conjunc- 

 tiva, 692 



cultural characteristics, 799 

 in healthy persons, 663 

 in lungs, 691 

 in pneumonia, 798 

 for serum production, 746 

 in tonsils, 670 

 vaccine, 737 



variation in infection, 673 

 pyogenes, 445, 662 



for antiserum production, 745 

 antitoxin for, 704 

 dissemination of, 677 

 elimination of, 679 

 in genital tract, 6.72 

 in healthy individuals, 663, 688 

 hemolysins of, 682 

 in infections, 795 

 in nasal cavity, 690 

 in pneumonia, 798 

 in tonsils, 670 

 toxin of, 676 

 vaccine for, 737 

 variation in infection, 673 

 virulence, 674 

 salivarius, in mouth, 594 

 viridans, 795 



in mouth, 594, 595 

 Stump root of cabbage, 969 

 Subcutaneous tissue, protection by, 689 

 Subsidence in water, 319 

 Sucrase, 210 

 Sugar, in fermentation, 233 



production of, 580 

 Sugar beet, soft rot of, 987 

 leaf spot of, 976 

 tuberculosis of, 972 

 Sulphate reduction, 423 

 in sewage, 335 

 in soil, 423 

 Sulpho-bacteria, 93, 105, 107, in 



in soil, 422 

 Sulphofication, 423 

 Sulphur cycle, 262 

 oxidation, 237 



Sulphur in soils, 421 



Sulphurous acid as preservative, 555 



Surface tension, 168, 169 



film, 169 



molecular pressure, 169 

 Surface washings in water, 312 

 Surra, 887 

 Susceptibility, 684 



definition, 684 



familial, 688 



general, 684 



hyper, 684 



individual, 688 



natural, 687 



racial, 687 



Suspensions for agglutination tests, 751 

 Swamp fever, 873 

 Sweet corn, wilt of, 989 



curdling of milk, 464 

 Swine erysipelas, 832 

 Swiss cheese, 500 

 Symbiosis, 297 



Symbiotic nitrogen fixation, cultures in, 

 414 



development of organisms, 408 



entrance of organisms, 408 



environmental relations, 410 



history of, 405 



inoculation, methods of, 412, 414 



legume-earth for inoculation, 414 



mechanism of, 410 



physiological efficiency, 409 



resistance of plants, 409 



specialization, 410 



variations, 410 

 Symptomatic anthrax, 839 



vaccine, 729 

 Syphilis, 903 



test for, 708 



test by luetin, 753 

 Syrups, preservation of, 522 



TAFFIA, 632 

 Taints in milk, 428 

 Tanks, anaerobic, 342 

 septic, 342 



