An experimental study of the psychic sciences. Contents: cryptoidal phenomena; thought, the hidden force; animal magnetism in the light of new investigations; our own subliminal powers; psychology of the future, parapsychical phenomena; new experimental method in hypnology; mesmerism and suggestion; provocation of sleep at a distance; telepathy; relation of telepathy to human magnetism; apparent transposition of the senses; colors of human magnetism; strange phenomena; exteriorization, or dissociation of the motor nerve force; scientific study of spiritism; human radiations; conductibility of psychic force.