The First or Elder Vienna School of Medicine was initiated by Gerard van Swieten, the famous pupil of Herman Boerhaave. The aim of this school was to put medicine on new scientific foundations-promoting unprejudiced clinical observation, botanical and chemical research, and the introduction of simple but powerful remedies. One of the products of this school was Anton Störck (1731-1803), appointed Director of Austrian public health and medical education by Empress Maria Theresia. Following the tradition of the Vienna School, Störck was the first scientist to systematically test the effects of so-called poisonous plants (e.g., hemlock, henbane, meadow saffron). Discovering new therapeutic properties in previously dreaded plants, Störck used himself as a subject in experiments to determine tolerable dose levels. As a result of his investigations, Störck was able to successfully treat his patients using the drugs he discovered. Samuel Hahnemann's later writings, including his "Organon", show that he was considerably influenced by Störck's ideas. In fact, Hahnemann's clinical teacher at Vienna was a follower of Störck, Joseph Quarin. Hahnemann's elaborate system of validating homeopath material can be seen as a development and refinement of the techniques he learned in Vienna.