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 his work on "Soul's Voyages," he detailed experiments with LSD and psilocybin that he performed with Albert Hofmann, pharmacologist Heribert Konzett, and writer Ernst Jünger.