Although in one place he proclaims loudly that the emergence of consciousness from matter must ever remain a mystery, he yet shows indication of a hope that it may yet be solved.

He quotes with approval, and with an implication that he himself leans to the view expressed in them, the following words of Ueberweg, whom he calls '_one of the subtlest heads that Germany has produced_.' '_What happens in the brain_, says Ueberweg, '_would in my opinion not be possible if the process which here appears in its greatest concentration, did not obtain generally, only in a vastly diminished degree.

Take a pair of mice, and a cask of flour.

By copious nourishment the animals increase and multiply, and in the same proportion sensations and feelings augment.

The quantity of these preserved by the first pair is not simply diffused among their descendants, for in that case the last would feel more fully than the first.