The present work is devoted to a scientific inquiry concerning man's prospects for a future life. In pursuing this inquiry the author has endeavored to follow the strictest rules of scientific induction, taking nothing for granted that is not axiomatic, and holding that there is nothing worthy of belief that is not sustained by a solid basis of well-authenticated facts. In other words, he has studied the science of the soul precisely as the physical sciences are studied ; namely, from an attentive observation, and a systematic classification, of the facts pertaining to the subject-matter.