Ill 



bined form. From this point further additions of al- 

 bumen have no appreciable effect. 



Such is on the contrary not the case for the normal 

 serum. When a gradually increasing quantity of this 

 is added, the hremolytic power of the tetanolysin is 

 decreased. It is curious that in the case of such a 

 strong dose as 1250 S this property is not more con- 

 spicous than in the above table. This most probably 

 depends on an accident, as appears from the following 

 experiment which is carried out with 2,5 / blood, 

 diluted with 7,8 % cane sugar solution. 



In this case the second effect of serum is more di- 

 stinct than in the preceding case and is perceptible al- 

 ready with 620 S. 



On the other hand the former table is more instruc- 

 tive as regards the action of the smallest doses of serum. 

 After this is appears that normal serum in higher doses 

 has a real neutralising action upon tetanolysin. A body 

 with such an effect, viz. antitetanolysin will be ex- 

 amined below. The normal serum may be considered 

 as composed of a small amount of antitoxin and great 

 amounts of albumen. 



Additions of proleids, normal scrum included, have 



