THE RECEPTOR APPARATUS OF THE RED BLOOD-CELLS. 403 



crease of affinity would constitute a wonderful illustration ot how 

 well the process of assimilation is adapted to its purpose. 



NOTE. Subsequent addition to page 400: 



Calraette also has recently reported (Compt. rend, de I'Academie des sciences, 

 T. 134. No. 24, 1902) that the blood-cells of animals highly immunized with 

 cobra poison preserve their sensitiveness completely against the hsemolysin 

 of the cobra poison, In a goat highly immunized with ricin, Jacoby (Hof- 

 meister's Beitrage z. chem Physiologic und Pathologic, Bd. II, 1902) was 

 unable to discover any increased resistance of the red blood-cells against the 

 action of the ncm, 



