Subjective sensations of sight and sound, abiotrophy

Front matter

Class :Ji_£_.3M Book -''x^ T^

Copyright lsi°.

(TOFYRIGHT DEPOSHV

Preface

The following Lectures, which have appeared in print at various times, have been carefully revised. The first lec-- ture has been throughout rewritten, and its substance rearranged, in the light of later experience, which has not, however, modified its chief conclusions. These can only be extended by the collection of many other facts observed with care and recorded with precision. To promote such observations is one object of its republication. The second has also been carefully revised, and will likewise, I hope, promote more systematic study of a symptom which is apt to be passed over as too common to merit attention. Of the other lectures I need only say that the last, "On the Use of Drugs," although given some years ago, seems to need no change in consequence of fresh knowledge. There is indeed a prospect that our ultimate conceptions may be thrown into crucible, and recast by the influence of ardent thought, through the discoveries regarding radio-activity, and the possible nature of the elementary constituents of matter. But we must remember that these do not alter the coarser facts we were previously able to perceive. All that has been demonstrated regarding atoms and molecules, chemical affinities, and chemical compounds and combinations, and the relation of these to energy, latent or released, remains true, whatever may be discerned of the ultimate nature of the processes.

W. R. G.

Contents

PAGE

I. Subjective Visual Sensations, 9

II. Subjective Sensations of Sound, 57