MASTERING THE MICROBE 



pectation that the physician of the future, armed 

 with the new weapons of the immunizator, and co- 

 operating with the hygienist, will pursue the deadlier 

 germs until many of them become extinct species. 

 Man has exterminated hosts of friendly beasts. He 

 should be able to wage equally successful warfare 

 against the enemies that know no habitat but his 

 own body, yet which have been chiefly responsible 

 for reducing the average age of the race to about 

 half its normal span. 



Hitherto the physician has been fighting in the 

 dark against these hosts of malignant microbes. But 

 the microscopists of a generation ago revealed the 

 enemy, and the immunizator now places in our hands 

 the weapons for their annihilation. 



