416 BACTERIOLOGY. 



road the practical importance of self help in 

 cases of misfortune might be taught. And in 

 the Hochschulen and the Seminars, technolo- 

 gists, administrative officers and teachers 

 should find opportunity for familiarizing them- 

 selves with the facts of hygiene, each according 

 to his special needs, in order that he may be 

 able to conduct his work in the real service 

 of the people. In this important matter of 

 hygienic instruction Germany and Austria 

 are extraordinarily backward, and are far out- 

 stripped by some countries, as for example by 

 Hungary. 



Besides the general increase of the power 

 of resistance, that is rendered possible through 

 the use of the measures I have suggested, 

 it is possible to gain an isop'athic or spe- 

 cific resistance against certain diseases by 

 means of preventive vaccination. I may re- 

 fer my readers to the thorough treatment of 

 this topic in the preceding chapter (p. 314) 

 and content myself here with a statement 

 of the fact that the old method of vaccination 

 against small-pox by means of cow-pox has, 

 with but slight modifications, stood the test 

 of time. Even the opponents of vaccination 

 now direct their attacks rather against com- 

 pulsory vaccination than against the inocula- 

 tion itself, so far at least as they are candid 



