The doctor and scientist G. Madaus wrote the unparalleled standard work on biological remedies. It was the result of decades of work, and also presented the sum of his own knowledge and that of his contemporaries. Long out of print, the work of this pioneer of biological thinking and treatment in medicine is now available in this reprint not only to those in the medical profession interested in biological treatments, but also to the growing number of people who attach importance to the natural healing powers of plants and a deeper understanding of folk medicine.