In this volume, James Young Simpson, the eminent Scottish physician and obstetrician, presents his insights on various medical topics such as the properties and uses of chloroform, hospitalism, hermaphroditism, and vaccination against smallpox. Simpson was a pioneering figure in the development of anesthesia and a promoter of the use of chloroform in childbirth, a subject on which he published several books. The book provides a fascinating insight into the state of medical knowledge in the mid-nineteenth century and the efforts of doctors to improve health and wellbeing in their communities. 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.