INDEX 



617 



Bacteriophage, irradiation of; 291 



, isolation of; 21, 38 



, isolation of pure races; 156 



, isolation from mixed cultures; 



234, 237 



, leucocytic origin of; 311 



, living nature of; 326, 329, 354 



metabolic products, inhibition by; 



216 



, mode of action of; 369 



, multiple races of; 416 



, multiple virulences of; 432 



multiplication, arrest of; 127 



, factors influencing; 121, 349 



with resistant bacteria; 210 



, nature of; 309, 329 



, nature of substance of; 282 



, opsonic action of; 408 



, passage through collodion sacs; 



274 



, penetration of bacteria; 112 



, phagocytosis of; 383 



, physical state of; 273 



, precipitation of; 287 



, preservation of; 285 



, production of antisera to; 383 



, pure races of; 155 



, qualitative variations in; 139 



races in barbone; 246 



in dysentery; 242 



in flacherie ; 256 



in fowl typhosis; 242, 246 



in paratyphoid fever; 252 



in plague; 247 



in plant nodules; 259 



in silk-worms ; 256 



in typhoid fever; 248 



, individuality of; 169 



of intestinal tract; 416 



— — • , pure; 155 



, separation of; 156 



, variable resistance of; 306 



-, variation in virulence of; 152 



, rate of multiplication of; 115 



, refractile index of; 134 



, relation to aphthous fever; 576 



, relation to Flattenformen; 11 



, relation to Hankin's principle; 7 



Bacteriophage, relation to origin of 

 life; 375 



, relation to principle of Emmerich 



and Low; 10 



, relation to viruses; 358 



, sedimentation of; 280 



, sensitization to toxin by; 404 



, serial action with; 40 



, significance of concentration of; 



145 



, solubility of; 282 



species, concept of; 365 



, symbiosis with bacteria; 211 



. therapy of avian typhosis; 490 



of B. coli infections; 553 



of bubonic plague ; 567 



in chronic colitis; 549 



of dysentery; 540 



of infected wounds; 564 



of paratyphoid fever; 550 



of staphylococcus infections; 



558 



of streptococcus infections; 



567 



of typhoid fever; 549 



, thermal death point of; 292 



, ubiquity of; 416 



, ultrafiltration of; 274 



, unicity of; 358 



, variability of; 350 



, variations in virulence of; 137, 



159, 437 



virulence, acquisition of; 175 



and colony type; 209 



, attenuation of; 165 



— , Appelmans method of deter- 

 mining; 142 



, Beckerich and Hauduroy 



method of determining; 145 

 , d'Herelle method of deter- 

 mining; 150 



, virulences in normal animals; 431 



virulence, increase in; 160 



, Janzen and Wolff method of 



determining; 146 

 , Maitland method of deter- 

 mining; 148 

 , multiple; 170 



