This book provides insights into the unity of the human body, both in terms of mental and physical aspects, with a focus on improving the application of constitutional treatment of local diseases. George Macilwain discusses the sympathetic phenomena in the body and how different parts of the body are interconnected. This book is a must-read for medical students and practitioners looking for an in-depth understanding of the functioning of the human body. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.