406 BACTERIOLOGY. 



fluence of the scientific conception of bacteriol- 

 ogy upon the improvement of individual and 

 national health. 



The removal of the predisposition to disease 

 is the most thorough-going way of making all 

 infectious disease impossible, and in this 

 direction much practical advance has already 

 been made. It seems to me, indeed, that in 

 demanding full consideration for this question, 

 hygiene carries within itself a powerful edu- 

 cative force for social healthfulness, the signi- 

 ficance of which for the future hygiene of the 

 race can perhaps hardly be divined. This 

 force, however, can make itself fully felt only 

 through the medium of a general sanitary 

 education. In the preceding century and in 

 the first half of the present century, J. P. 

 Frank, Halle and Levy attempted to bring 

 this about. Men were to be observed like 

 hot-house plants and only the hypochondriacs 

 were to be grown large ; they were to eat only 

 -with the balance and control the amount of 

 their drink with measuring glasses, in the 

 chemical, not in the Munich sense, they 

 were daily to ascertain their temperatures 

 with the thermometer in order that no mistake 

 might be made. Education to a state of panic 

 is not a wholly new discovery of the Kochian 

 bacteriology, and the earlier products of the 



