58 C. U. ARIENS KAPPERS 



a reciprocal action, based on a striving after equilibrium, a con- 

 trary differentiation or manifestation of energy which can react 

 toward a defect with a proliferation, toward pressure with in- 

 creased hardness, toward light with pigment, toward toxin with 

 antitoxin. 8 



Moreover, the organism whose reciprocating energy has thus 

 been evoked remains throughout a unit materially and func- 

 tionally, viz., it shows in all its parts an associated correlation, 

 and the developed organism manifests itself as one correlated 

 system whose harmony is astonishingly reasonable in a logetic 

 sense. 



One need only think of the relation between lens, retina, and 

 pigment in the eye, the mutual development of which far exceeds 

 in logical, or rather logetic, relation the mental possibilities of 

 our conscious logical intellect. 



Thus, there is in our somatic development a logetically 

 correlated relation which has its origin in the same cause as the 

 mental associations, viz., in different but simultaneously oper- 

 ating, i.e., correlated, influences. 



In this development of form the 'function' is inherent of which 

 the 'logetical' relation with the surrounding world and with the 

 rest of the body is not less evident, and operates with the exact- 

 ness of mathematical reasoning; witness the different ways in 

 which accommodation of vision is effected in the animal series. 



It appears, therefore, that the associative differentiation of the 

 body is in its result a different thing from the associative linking 

 in the nervous system, but that both of them find their origin in cor- 

 related stimuli. 



Both the neuronic linking and the building up of our conscious 

 mental life, on the one hand, and bodily differentiation, on the 

 other, are reasonable correlations,originating in correlated irrita- 

 tions, two different forms of logetic realization. 



Besides these, there are in both processes other common fac- 

 tors, which again manifest themselves in each in a different way, 



8 The manner in which Dature forma its somatic images differs from that in 

 which its mental images are conceived in that the latter are not contrary to the 

 influence in the sense just described. 



