This is an OCR edition without illustrations or index. It may have numerous typos or missing text. However, purchasers can download a free scanned copy of the original rare book from GeneralBooksClub.com. You can also preview excerpts from the book there. Purchasers are also entitled to a free trial membership in the General Books Club where they can select from more than a million books without charge. Volume: 4; Original Published by: Macmilan in 1921 in 318 pages; Subjects: Health & Fitness / General; Health & Fitness / Diets; Health & Fitness / Exercise; Health & Fitness / Healthy Living; Juvenile Nonfiction / Science & Nature / Anatomy & Physiology; Medical / Physiology; Science / Life Sciences / Anatomy & Physiology;