and even had been rediscovered decades before; but not until this period were they extensively and authoritatively acknowledged. This reinstatement was naturally the result of coöperation of many workers; while hypnotism still remained a favorite study of French neurologists, other countries contributed extensively to its advance. In Germany the main impetus to its study seems to have been given by the striking demonstrations of hypnotic phenomena by a Danish hypnotist, Hansen (1879 and 1880), which led to their study by various physiologists. The earliest American contribution of this period (and which was somewhat independent in origin) was a study of trance-states by Dr. G. M. Beard, of New York, in 1881. But accounts of contributors and contributions belong no longer to the historical aspect which we are considering, but to modern hypnotism. Suffice it to say that the literature of the subject of the past two decades is almost alarmingly voluminous in its extent, and most cosmopolitan in its composition; that cognate departments of science--physiology, psychology, medicine--consider its bearings upon their special problems; that its therapeutic application to the cure of disease by the efficacy of the power of suggestion is recognized extensively by general practitioners, by neurologists, as well as in specific hypnotic clinics; that its utilization as a special method of psychology has been productive of interesting and valuable contributions; and that it illuminates many a dark recess in the story of the historical and sociological development of humanity. One phase of the matter, alone, seems destined to serve as an historical turning-point; the year of the new epoch is best marked by the appearance in 1886 of Dr. Bernheim's classic volume on "Suggestion and its Therapeutical Applications"; and the key-note of the newer doctrine lies in the term "suggestion." Charcot and his followers had, in different degrees and ways, emphasized the physical characteristics of the hypnosis; they held that in typical subjects there were objectively distinct hypnotic states, characterized and induced by physical manifestations. They recognized the importance of suggestion, but in addition to it also recognized the existence of objectively differentiated hypnotic phenomena. These and related doctrines are commonly referred to as those of the "school of Paris." In contrast with this is the "school of Nancy," of which Dr. Bernheim is the acknowledged leader, and which may be characterized as the "suggestionist" school. This school recognizes different degrees of suggestibility, and an endless variety of resulting phenomena, but regards suggestion, in its various forms, as furnishing a sufficient and comprehensive clue to the entire range of observations. It is compelled accordingly to regard the three distinctive states recognized by Charcot as themselves the product of unconscious suggestion and of a contagious _esprit de corps_ of the Salpêtrière subjects.