250 BACTERIOLOGY. 



by use of the very same forces which serve to 

 create or alter the human constitution. In 

 this simple sense there is a true art of healing. 

 The external conditions to which a human 

 being is subjected according to season and 

 locality make themselves felt throughout the 

 organs, tissues, and cells of the whole body. 

 This they do through the mediation of meta- 

 bolism and by the aid of the nervous system, 

 factors that determine the character of the 

 synthesis or the building up of the organism, 

 and, as before mentioned, that determine also 

 the kind and amount of the resistance that 

 hinders release of energy. We are accord- 

 ingly set the further task of guiding the course 

 of events by the use of those conditions that 

 create resistances, and guiding them further- 

 more in such a way that the physiological resis- 

 tances are naturally and readily overcome, and 

 the liberation of energy follows easily and in 

 normal paths, while all sorts of pathological 

 resistances are avoided and the pathological 

 setting-free of energy prevented. Since the 

 kind and amount of resistance met with in the 

 organic kingdom is a consequence of organic 

 structure, this task practically coincides with 

 the first, namely that of influencing by the aid 

 of suitable external conditions the potential 



