xii ILLUSTRATIONS 



FACING 



feMILE DUCLAUX (after BORDES) 



The favorite disciple of the great scientist 

 and the first director of the Institute in the 

 Rue Dutot, who collaborated in Pasteur's 

 researches and carried on his work . . 116 



TWO OP PASTEUR'S GREAT COLLABORA- 

 TORS 



On the left: Doctor Roux, director of the 

 Pasteur Institute, and inventor of the 

 method of treating diphtheria by a cerum 

 obtained from horses. On the right: Doctor 

 Metchnikoff, celebrated for his theory of 

 phagocytosis and his works on the intestinal 

 flora 148 



PASTEUR'S TOMB 



It is in the Rue Dutot, beneath the princi- 

 pal entrance to the Pasteur Institute, in a 

 crypt lined with marble, that one of the 

 most glorious representatives of universal 

 science has found his last resting place . 212 



