1909.] On the Absorption of Agglutinin by Bacteria, etc. 191 



in full in a later paper dealing with that subject,* and in addition we have 

 been able to prove from Bayliss' figures dealing with the adsorption of 

 Congo red by filter paper that the adsorbed amount C not only reaches 

 a maximum, but even decreases subsequently, a fact to which Bayliss 

 himself has drawn no attention. 



3. That Arrhenius has no justification for drawing conclusions as to the 

 nature of the interaction between bacilli and the homologous agglutinin from 

 the size of the exponent n in his equation C = ^'B", a point on which he lays 

 great stress as a means of distinguishing it from the adsorption processes, is 

 clearly shown by our experiments. 



Before dealing with the size of n and k it is worth while mentioning that 

 if this formula were applicable, the line obtained by plotting out the 

 logarithms of the values of B as ordinates, and of C as abscissae, would be a 

 straight one. How far this is from being the case can be seen from every 

 single experiment recorded in this paper, and is further evident from the 

 curve herein published. By plotting out the logarithms of the values of 

 B and C in this way it is possible to determine n and k. 



From Experiment 14 and curve, fig. 1, where the logarithms for values of 



.£xper. /'f. 



L og. B. 

 40 

 3-6 

 3-2 

 2-8 

 2-4 

 Z-0 

 /■6 

 12 



0-a 



0-4 

 0-0 



0-4 



Ley C. 



















































































































































































































































» — . 













































































































































































































































































































































































0 











































































































































































































































































































































































































































































































































































































































































































/•4 1-5 1-6 1-7 /-a 1-9 S-0 2-1 2-2 2-3 2-* 2-5 2€ 



Fig. 1. 



* A preliminary communication on this subject was given at the January meeting 

 the Pathological Society of Great Britain and Ireland, 1909. 



