""Diet In Composition And Quantity As Best Adapted To A Prolonged Existence"" is a book written by C. De Lacy Evans. The book is focused on the importance of diet for a long and healthy life. The author discusses the composition and quantity of food that is best suited for prolonged existence. The book also covers the impact of various food groups on the human body, including proteins, carbohydrates, fats, and vitamins. Additionally, the author provides...