Mysterious Psychic Forces: An Account of the Author's Investigations in Psychical Research, Together with Those of Other European Savants

A scientific publication written in the early 20th century. The work delves into investigations of psychical phenomena, particularly focusing on mediums and related spiritualistic practices that were prominent during the period. Flammarion aims to explore the existence and nature of psychic forces, challenging skepticism and advocating for a scientific approach to subjects often dismissed as mere superstition. At the start of the book, Flammarion presents a preface outlining his motivations for investigating psychical phenomena, defending the importance of exploring unknown forces that could expand human understanding of nature and the universe. He reflects on his extensive experiences with various mediums, particularly Eusapia Paladino, and recounts observations of phenomena, such as levitation and unexplained noises, questioning the traditional boundaries of scientific inquiry. Flammarion's intent is not to claim supernatural explanations but rather to seek empirical evidence that could elucidate these mysterious forces, encouraging readers to remain open-minded in their pursuit of truth.