In recommending a very careful study of Professor Forel's book to the English-reading medical public, I can confidently promise that both from an academic and also a practical point of view much benefit will thereby be gained. Professor Forel is a true philosopher, and treats his subject consistently in a logical spirit; Professor Forel is a psychologist and physiologist of no meager description, and his utterances for this reason deserve careful consideration.

The importance of studying the functional aspects of thought and of other psychical exercises has become an urgency, more especially since this is not taught in our medical schools; and the impressions which the practitioner gains depend greatly on accident, and on the particular trend of his mental reasoning.

While it is obviously impossible for any one to be in a position to criticise a subject like hypnotism by the mere perusal of a volume, I feel sure that the entlnisiasm which this book is capable of awakening for this subject is of such a nature that future opportunities of acquiring personal practical acquaintance with hypnosis will be grasped by all intelligent students. For myself, I would say that medical practice without suggestion is an impossibility. Furthermore, I am convinced that this holds good universally, although it is not widely recognized.

In offering this translation to the English-speaking reader, I must apologize for having introduced a few new or changed technical terms when these appeared to me to correspond more exactly to the original text than already existing terms. For the rest, I trust the reader will find the English edition of Professor Forel's work an interesting book, and one from which much knowledge may be acquired.

H. W. ARMIT. Wembley.