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. Original Published by: John Wiley & Sons in 1919 in 301 pages; Subjects: Rocks; History / General; Juvenile Nonfiction / Science & Nature / Earth Sciences / Rocks & Minerals; Nature / Rocks & Minerals; Science / Chemistry / General; Science / Earth Sciences / Geology;