This book delves into the field of electro-physiology, exploring the electrical properties of biological cells and tissues. Wilhelm Biedermann provides detailed descriptions of the equipment and techniques used to study electrical signals in the body, and presents case studies of his own research. This book is an essential read for anyone with an interest in the principles of electro-physiology. 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.