But that is all.

We are not thereby brought any nearer to a treatment of intensity as a multitude.

We merely know now a relation in which intensity stands that we did not know before.

It does not affect the case in the least that the object with which intensity has been shown to stand in relation is itself a multitude.

Physiology can be said to throw light upon psychological matters only in so far as a sufficient number of these relations between experiences and physiological processes are discovered to warrant the inductive assumption that certain known physiological units stand in certain relations to known psychical units or that certain as yet unknown psychical units exist and are related to these known physiological units in certain ways.