VI 



For the purpose of making the following experiments 

 more conspicuous, the action of the agglulinin is not 

 indicated by the doses themselves, but by their reci- 

 procal values, as it is usual in the standardising ot 

 diphtheria antitoxin. For the agglutinin we have thus 

 introduced a unit, which is quite arbitrary and only 

 of value for the comparison of our experiments. 



The above example therefore is to set up in the 

 following scheme. 



The sum total of the results of such series of lesls 

 is rendered most plain when plotted out on paper in 

 the form of a curve. As abscissa is marked out the 

 day, upon which the serum was taken, and as ordina- 

 te is indicated the agglutinin units pr. cc. of the serum. 



The result of the experiment mentioned above is re- 

 presented on curve No. 1. This is one of the first under- 

 taken; with some practise more exact figures can be 

 obtained. 



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