Here are a few deep words of Professor Boutleroff, a Russian scientist whom I, in common with all Russians, greatly respect: "....All this belongs to knowledge; the increase of the mass of knowledge will only enrich and not abolish science. This must be accomplished on the strength of serious observation, of study, of experience, and under the guidance of positive scientific methods, by which people are taught to acknowledge every other phenomenon of nature. We do not call you blindly to accept hypotheses, after the example of bygone years, but to seek after knowledge; we do not invite you to give up science, but to enlarge her regions..." This was said about spiritualist phenomena. As to the rest of our learned physiologists, this is, approximately, what they have the right to say: "We know well certain phenomena of nature which we have personally studied and investigated, under certain conditions, which we call normal or abnormal, and we guarantee the accuracy of our conclusions." However, it would be very well if they added: "But having no pretensions to assure the world that we are acquainted with all the forces of nature, known and unknown, we do not claim the right to hold back other people from bold investigations in regions which we have not reached as yet, owing to our great cautiousness and also to our moral timidity. Not being able to maintain that the human organism is utterly incapable of developing certain transcendental powers, which are rare, and observable only under certain conditions, unknown to science, we by no means wish to keep other explorers within the limits of our own scientific discoveries." By pronouncing this noble, and, at the same time, modest speech, our physiologists would doubtless gain the undying gratitude of posterity. After this speech there would be no fear of mockery, no danger of losing one's reputation for veracity and sound reason; and the learned colleagues of these broad-minded physiologists would investigate every phenomenon of nature seriously and openly. The phenomena of spiritualism would then transmigrate from the region of materialized "mothers-in-law" and half-witted fortune-telling to the regions of the psycho-physiological sciences. The celebrated "spirits" would probably evaporate, but in their stead the living spirit, which "belongeth not to this world," would become better known and better realized by humanity, because humanity will comprehend the harmony of the whole only after learning how closely the visible world is bound to the world invisible. After this speech, Haeckel at the head of the evolutionists, and Alfred Russel Wallace at the head of the spiritualists, would be relieved from many anxieties, and would shake hands in brotherhood. Seriously speaking, what is there to prevent humanity from acknowledging two active forces within itself; one purely animal, the other purely divine?