92 BACTERIA IN DAILY LIFE 



vestigated. Can sunshine interfere with the 

 therapeutic effect of diphtheria - serum, for ex- 

 ample ? If simple insolation can so profoundly 

 modify the character of toxic fluids, it is not 

 unreasonable to anticipate some action on these 

 anti-toxins, and their study in this connection 

 would appear to offer an important step in the 

 direction of unravelling the mystery attending 

 the action of light on life. 



