ANAPHYLAXIS 105 



stands out prominently above all others, because he has furnished 

 us with a working hypothesis which satisfactorily explains many 

 observations that have been made in this field, and because its study 

 has opened up new avenues of research along which much fruitful 

 work has already been accomplished. That man is Paul Ehrlich, 

 and in the subsequent chapter we shall endeavor to show that on 

 the basis of his now world-famous side-chain theory the formation 

 of the many groups of antibodies with which we have already 

 become acquainted can be explained and their specific properties 

 accounted for. 



