Dippel's Oil, the rectified form of the black fetid oil, containing amnionic carbonate, which can be obtained by the destructive distillation of animal matter, such as stag's-horn, ivory, or blood. The cruder form was used in medicine, despite its appearance and odor, until Dippel refined it. His oil was formerly prescribed as an anti-spasmodic and diaphoretic, and as a hypnotic.

Entry from Everybody's Cyclopedia, 1912.