Another Book on the 

 Bacteriophage 



Your library on the bacteriophage is not com- 

 plete unless you have 



IMMUNITY IN NATURAL INFECTIOUS 

 DISEASE 



In this book Dr. d'Herelle sets forth a new con- 

 cept of the mechanism of immunity, involving a 

 radical modification of some of the ideas which 

 have hitherto dominated immunologic thought. 



In four parts, as follows : 

 I The Reactions of Living Matter 

 II The Reactions Against Inanimate Objects 



III The Reaction Against Bacteria 



IV The Ultra viruses and Immunity Against 



Them 



Cloth, gold stamped 6x9 400 pages 



Price $5,00 

 THE WILLIAMS & WILKINS COMPANY 



Publishers of Scientific Books and Periodicals 



BALTIMORE, U. S. A. 



