Roger Parry, a photographer who produced experimental images that related to both modernism and Surrealism, also had a commercial studio. He produced this image for a promotional campaign for André Maurois’s science fiction tale The Weigher of Souls (Le Peseur d’ames), in which a doctor’s experiments to find immortality reveal that life force is a gas that escapes the body at death. The photograph illustrates a sentence from the book about a ball that contained the spirits of two brothers captured in an invisible beam of light. | quoted from source