he was too much engrossed by his strange studies to form an opinion upon the subject one way or the other.
For many years there was one question which had continually obtruded itself upon his thoughts. All his experiments and his theories turned upon a single point. A hundred times a day the Professor asked himself whether it was possible for the human spirit to exist apart from the body for a time and then to return to it once again. When the possibility first suggested itself to him his scientific mind had revolted from it. It clashed too violently with preconceived ideas and the prejudices of his early training. Gradually, however, as he proceeded farther and farther along the pathway of original research, his mind shook off its old fetters and became ready to face any conclusion which could reconcile the facts. There were many things which made him believe that it was possible for mind to exist apart from matter. At last it occurred to him that by a daring and original experiment the question might be definitely decided.
"It is evident," he remarked in his celebrated article upon invisible entities, which appeared in the Keinplatz wochenliche Medicalschrift about this time, and which surprised the whole scientific world—"it is evident that under certain conditions the soul or mind does separate itself from the body. In the case of a mesmerised person, the body lies in a cataleptic condition, but the spirit has left it. Perhaps you reply that the soul is there, but in a dormant condition. I answer
