""The Science of Life, or Self-Preservation"" is a medical treatise written by William Humboldt Parker in 1881. The book focuses on various topics related to nervous and physical debility, including spermatorrhoea, impotence, and sterility. The author provides detailed information on the causes, symptoms, and treatment options for these conditions. The book also includes a discussion on the importance of self-preservation and the role of diet, exercise,...