The Relations of Mind and Brain

are points in the summary with which we cannot agree; but this review threatens to reach such undue dimensions that we must withhold what we had written. There is a great risk of being tempted to theorize in studying the automico-physiological experiment of Dr Burdon Sanderson, although it seems favourable to our views, but we forbear. All the more, when we see how Professor Bain (who is on our side also) and Dr Caldervvood proceed to compute the entire number of cells in the cerebrum, and whether or not they will suffice for both the acquisition and the retention of knowledge. Allowance is even made in the computation for some impressions being so evanescent as to admit of storing-room for subsequent impressions stronger and more permanent. Such speculations are surely too mechanical and quite beside the question. We cannot explain the mysterious contact of mind with matter. The connexion is unthinkable, and beyond our ken in all its aspects. The author discusses in his next chapter (VII.) the subject of 11 Personal Experience as connected with Sensation," in his usual able manner. It has no special bearing, however, on the subject