Keynotes to the Materia Medica is a book written by Henry Newell Guernsey in 1886. The book is a comprehensive guide to homeopathic medicine and provides a detailed description of the symptoms and characteristics of various homeopathic remedies. The book is divided into two parts, with the first part covering the general principles of homeopathy and the second part providing a detailed analysis of over 200 homeopathic remedies. Each remedy is described in detail, including its key symptoms, its mode of action, and the conditions for which it is most effective. The book also includes a glossary of terms and a detailed index, making it a valuable reference for anyone interested in homeopathic medicine. Overall, Keynotes to the Materia Medica is an essential guide for anyone looking to understand the principles and practice of homeopathy.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.