The character of the contributors of this work is sufficient guarantee of its scientific presentation of the subject of Hypno-tism. It is designed as a compendium of this science. No truth has been knowingly omitted; no error wittingly included. While the authors may differ in opinion in regard to the real underlying cause of much of the phenomena, it will be observed that they are practically agreed on the main points at issue.

This work coming as it does from the pens of the most eminent scholars and scientists of the present century, must dispel all doubts as to the reality of hypnotism, and its claim for a place among the sciences of to-dav. - Editors.