In the following papers intelligent readers, both in and out of the medical profession, will find these subjects fairly stated and discussed, and to some of the questions asked, fair and reasonable answers given. It is with the hope of aiding somewhat in the efforts now being made to rescue from an uncertain and unreasoning supernatural ism some of the most valuable facts in nature, and some of the most interesting and beautiful psychical phenomena in human experience, that this book is offered to the public.