This textbook has been written to meet the demand for the study of the human body in the intermediate and grammar grades of the public schools. Especial attention has been given to the effects of alcoholic drinks on the organs and tissues of the body. In this respect no statement has been made that is not capable of positive proof. The author has also strongly insisted on the injury to young men and boys caused by the habit of smoking tobacco, which in too many cases prepares the way for more disastrous habits. Good health is one of the safeguards not only against suffering, but also against crime. Vicious habits often result from a lack of knowledge of the laws of health, while both physical and mental health are frequently impaired by conditions which a proper understanding of hygiene would obviate. Therefore, special attention has been given to general hygiene. It is believed that the study of the human body, together with a knowledge of the effects of alcohol upon it, will do much to make the coming generation wise, temperate, and moral.