In his paper, “On Travels in the Universe of the Soul”, he reported on self experimentation using lysergic acid diethylamide (LSD) and psilocybin that he had conducted with his friends Albert Hofmann, pharmacologist Heribert Konzett, and writer Ernst Jünger.
In a paper discussing "Journeys within the Soul," he reported on self-experiments involving LSD and psilocybin conducted by himself and his friends Albert Hofmann, pharmacologist Heribert Konzett, and writer Ernst Jünger.