CONTENTS XIU 



4. The Power of Assimilation of the Bacteriophage Corpuscle 341 



5. The Power of Adaptation of the Bacteriophage Corpuscle 341 



6. The Faculty of Multiplication of the Bacteriophage Corpuscle 349 



7. Variability of the Bacteriophage 350 



8. The Bacteriophage Corpuscle: A Living Ultravirus 354 



Resume 356 



Chapter IV 



THE UNICITY OP THE BACTERIOPHAGE PROTOBB 



1. The Bacteriophage Protobe 358 



2. Assimilation of the Protobes 360 



3. The Concept of Species Among the Microbes and the Protobes 365 



4. The Unicity of the Species Protohios hacteriophagus 366 



5. The Mode of Action of the Bacteriophage 369 



6. Consequences Resulting from the Living Nature of the Bacteriophage. . 374 

 Resum6 376 



PART IIL THE BEHAVIOR OF THE BACTERIOPHAGE PROTOBE 

 Chapter I 



THE BACTERIOPHAGE AS AN ANTIGEN 



1. Inoculation of the Bacteriophage 381 



2. Antibacteriophagic Sera 383 



3. The Course of the Action of the Antibacteriophagic Serum 386 



4. Variability in the Behavior of the Bacteriophage 387 



5. The Bacteriophage Antigen 391 



6. The Nature of the Antibacteriophagic Property 392 



7. Complexity of the Antibacteriophagic Serum 397 



8. The Anti-antibacteriophagic Serum 398 



9. The Action of Antibacterial Sera 400 



10. The Phenomenon of Antiphylaxis 403 



11. The Opsonic Action of Bacteriophage Suspensions 408 



Resume 414 



Chapter II 



THE ubiquity OF THE BACTERIOPHAGE 



1. The Bacteriophage in the Intestinal Tract 416 



2. The Bacteriophage in Healthy Man 418 



3. The Bacteriophage in Animals 424 



4. The Bacteriophage in the Horse 426 



5. The Bacteriophage in the Chicken and in the Goose 429 



6. The Bacteriophage as Found in a Number of Different Species 430 



7. The Virulence of the Bacteriophage in the Normal Animal 431 



8. The Bacteriophage in the External Environment 435 



Resume 436 



