Hildegard von Bingen's Physica : the complete English translation of her classif work on helath and healing

Gives a good sense of 12th century herbalism based on humors, common superstition, and sprinkled with a dose of Bingen's mystical insights.
Hildegard presents nine "books" of healing systems: Plants, Elements, Trees, Stones, Fish, Birds, Animals, Reptiles, and Metals. In each book she discusses the qualities of these natural creations and elaborates on their medicinal use, explaining how to prepare and apply different remedies. With its emphasis on balancing the humors, Physica has strong affinity with the Oriental medical approaches gaining great respect today.