DEVELOPMENT OP BACTERIOLOGY 11 







activities of a single kind of organism to be studied, and 

 its power for the good or ill of man determined. The de- 

 velopment, in 1882, of the gelatine-plate method for the 

 separation of kinds of bacteria, enabled Koch and his fol- 

 lowers to prove the bacterial nature of the cause of many 

 of the most important diseases of man and the lower animals. 

 Scarcely a year has passed, since 1860, that has not been 

 marked by discoveries of the greatest importance to human- 

 ity in bacteriology and its related sciences. 



Bacteriology has revolutionized the life of civilized man. 

 Without it our great cities would be impossible, for they 

 could not be provisioned. It has doubled the average span 

 of human life. It has made surgery possible. It touches 

 the life of every one of us in a multitude of ways, each day, 

 from birth to death. 



