76 EXPERIMENTAL RESEARCHES 



quently observed if some injury has befallen the 

 body. Thus, as you are aware, in a number of 

 intoxications the leucocytes give a positive 

 glycogen reaction. Even the slightest stimuli 

 may cause the leucocytes to split off glycogen in 

 their protoplasm. 



It will be necessary to assume that all these 

 compounds are joined to certain protoplasmic 

 groups, and that the decomposition of these 

 compounds is the result of a fermentative 

 action, resembling the decomposition of amyg- 

 dalin, under the influence of emulsin, into 

 glucose, hydrocyanic acid and benzaldehyde. 

 Further, it is very interesting to note that one 

 can often, by simple extracting substances like 

 alcohol or ether, remove from the cells fat in the 

 form of substances which still contain a proto- 

 plasmic component, although chemically they 

 would appear at first sight to be pure lipoid 

 substances. Such extracts have been prepared 

 from red blood corpuscles by Landsteiner, Bang 

 and Forssmann, who found that by injecting 

 such extracts into animals one can obtain 

 specific haemolysins. This phenomenon, which 

 they endeavoured to use as an argument against 

 my side-chain theory, is explained in the 

 simplest manner by Ryes' observations upon 



