This textbook provides a thorough overview of hygiene, the science of promoting health and preventing disease. It covers topics such as sanitation, nutrition, personal hygiene, infectious diseases, and environmental health, and offers practical advice for health professionals and laypeople alike. The book is a classic reference in the field of public health and a must-read for anyone interested in preventive medicine. 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.