1 196 



SUBJECT INDEX 



and encapsulation, 568 



and phagocytosis, 568 



for plant hosts, 570 



of pneumococci, 569, 863 



non-toxigenic, and electrophoretic potentials, 



569 



specific soluble substances and electrical 

 charge, 572 



variations in, 565, 566, 568 

 Virulin, 568, 872 

 Viruses, standard, 949. See also Filterable viruses 



rabies, 660, 951 



ultra-microscopic, 517 



vaccine, 949 

 Viscosity, 170, 544 



effect of bacteriophage on, 544 

 Vitamines, 657 



and antibody production, 1046 

 Voges-Proskauer reaction, 239, 240, 365, 392 

 Volutin, 16, 17 

 Vucin in chemotherapy, 1 1 24 



Warts, 518 



Wassermann. See also Complement fixation 

 antigen, 835 

 reaction, 838-47, 856 

 Wastes 

 dairy, 355 

 industrial, 359 

 Water 

 content of bacteria, 14, 352, 363 

 Bacteriology, 362-70 



See also Bad. coli 



bacterial counts, 363 



bacterial species in water, 363 



chlorination of water supplies, 368 



flavors in water, 369 



ground water, 369 



standards for water supplies, 368 



surface water, flora of, 364 



typhoid bacillus in water, 369, 370 

 film on salt solutions, 168 

 typhoid bacilli survival in, 77 

 absorption of ultra-violet rays, 374 

 ultra-violet sterilization of, 375 

 Waters 

 drinking, purification of, 374 

 colored, 374 

 of lakes and rivers, 58 

 natural, 60 

 spring, 64 

 stored, 63, 69 



toxicity of, 6fi 



turbid, 374 



from wells, 369 

 Waxes of bacteria, 18 

 Weight of bacteria, 229 

 Weil's disease, 487 

 Wheat, rose-red disease of, 591 

 Whooping cough, 943 

 Widal test, 817, 821 

 Wilt of moths, 518 



Worms and anaerobic conditions, 200 

 Wounds, 104 

 Wright's technique for phagocytosis, 877 



X-rays, 177, 371, 1040 



Y-shaped forms, 40 

 Yaws, 477 



complement fixation test in, 847 

 Yeasts, 498-508; 643, 649 



accessory substances, 499 



bactericidal effect, 508 



fat content of, 506 



fat formation by, 505 



fate of, in intestines, 507 



filterability, 499 



as laxative, 507 



and leukocyte count, 507 



morphology, 498 



origin, 498 



specific soluble substance from, 726 



therapeutic use of, 506 

 Yellow fever, 518 



and dengue, 493 



and infectious jaundice, 493 



Pfeiffer reaction in, 492 



spirochetes in, 490 

 Yellow trefoil, 334 

 Yellows (in dogs), 4S7 

 Yoghourt, 395 



Zeta 



function of Gibbs, 176 



potential, 169 

 Zettnow's technique for terminal filaments, 165 

 Ziehl-Neelsen method of staining, 24 

 Zone phenomenon, 688, 689 

 Zygospore formation, 90 

 Zymase, 276, 277, 501 



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