[Gazing into the depths of the soul: hypnotism in documentary and instructional film (1920-1936)].

Although part of the medical fold since the 1870s, hypnosis was long relegated to the margins, recognised and used by only a relatively small group of medical professionals. In the decades around 1900 hypnotic techniques were monopolised as a form of medical treatment through a long and in no way linear process. Hypnosis of laymen was vehemently opposed, however, denounced as being far too dangerous. And yet, medical participation in the aura of spectacular intervention into the human psyche garnered support. The medium of both documentary and instructional film served an important function in this regard, conveying popular interest in acknowledging hypnosis as a scientific method. On the basis of four medically accredited films on hypnosis from 1920 to 1936, this paper attempts to investigate how medical experts and these genres, as part of their effort to claim hypnosis from the realm of public spectacle and parapsychological experimentation, worked to stabilise hypnosis as a purified form of medical and psychiatric practice.