The highly interesting subjects discussed in this volume, written by a very distinguished French physician, have seemed to demand a careful translation, in order that its usefulness may be more generally diffused.

One of the principal propositions which the talented author has undertaken to prove is, that hallucination is not a necessary accompaniment or symptom of insanity, but that in certain cases it may be considered as a purely physiological phenome-non. He insists on the necessity of establishing an intimate union between philosophy and medicine especially in the treat-ment of mental diseases. "Psychological facts" he argues, "cannot be placed on the same-line with sensible facts. The brain may be the seat, but is not the creator of intellectual operations. Ideas pre-exist their sensible signs."

"Does not," he argues, "the analysis of different kinds of delirium afford a solid and experimental basis to metaphysics? And is not the study of mysticism indispensable for the correct appreciation of mental alienation?"

M. Brierre de Boismont treats the important and hitherto neglected subject of hallucination in various points of view, inasmuch as it bears important relations to philosophy, medicine, religion, history, morality, and jurisprudence. The apparitions of Holy Writ are handled with the reverence befitting a Christian, whilst much light is thrown on the probable origin of the hallucinations of many celebrated personages whose characters and actions were so exalted as to place them apparently above humanity.

The book will offer attractions to many classes of readers. The theologian will admire the vein of reverence and morality which pervades it; the philosopher will find much food for study and contemplation; the practical physician will avail himself of the knowledge and experience detailed in a great variety of cases; the lawyer will be deeply impressed by the necessity of vigilance, and a close study of the case, before he gives in his verdict of insanity; while the lover of the marvellous will find ample food for the gratification of his taste, in the number of strange and picturesque authenticated facts thus carefully collected.