It seems clear, then, that the student of psychic phenomena will find many promising lines of research in the ample field covered by telepathy, clairvoyance, and the varied activities of motor automatism. Fresh facts must be accumulated and sifted, fresh efforts made to co-ordinate such facts and discover the laws through which they work. Nevertheless, there remains another area of supernormal activities which cannot be neglected――the physical phenomena alleged to occur from time to time, almost invariably in the presence and apparently through the mediumship of certain individuals. In this obscure region, however, the opportunities for fraud have been so great, the detection of trickery so frequent, and the general character of the mediums often so indifferent, that, even with the experiences of a quarter of a century behind them, many careful and able researchers find it difficult to give any definite opinion either for or against the existence of such startling phenomena as “materialization,” “ectoplastic” extrusions from the body, or the movement of material objects without physical contact (telekinesis). The only excuse for offering my own personal views is the fact that I have over a long period of years had sittings with some of the world’s best known “physical” mediums including Mrs Corner (née Florence Cook), Eusapia Palladino, Eva C. (Marthe Béraud) and Willi Schneider, and a considerable number of less known sensitives, and I am unable to endorse the opinion recently suggested by a body of able and experienced German investigators, Drs Gulat-Wellenburg and Rosenbusch and Graf v. Klinckowstroen, that no scientific evidence exists for the occurrence of physical phenomena. On one occasion I have witnessed the production of a complete, visible and tangible figure which certainly was not the medium herself: that it was a confederate――the only other normal possibility――was ruled out by elaborate and convincing precautions. Despite the open readiness of Eusapia Palladino to cheat when left without control, many of the positive results secured through the mediumship of this Neapolitan peasant-woman under test-conditions appear to defy any normal explanation. The sceptic has still to explain how after a searching examination, medical and otherwise, Eva C. under stringent conditions of control and observation was able to exude from her body solid and fluid masses of so-called ectoplasm, the existence of which was duly recorded by photography. No reliable evidence exists to disprove the claim made on behalf of D. D. Home, that he was never detected in any kind of mediumistic fraud, and much of the evidence resulting from the personal experience of cultured and educated persons with this medium is staggering in its completeness. “On that very hearthrug where you are standing,” said the late Sir William Crookes, F.R.S., to me, “I saw Home raised eighteen inches from the ground in