Fragmenta de viribus medicamentorum positivis sive in sano corpore humano observatis. 2 vols.

Hahnemann's first published homeopathic book, his first title on Materia Medica and Repertory, and the first collection of drug provings on the healthy body. The book lists the health effects of 27 drugs in common use as recorded in the medical literature along with Hahnemann's own observations from taking the drugs himself.