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 W. Parker and Son in 1851 in 131 pages; Subjects: Science / Earth Sciences / Geography; Science / Earth Sciences / Geology; Science / Geophysics; Social Science / Human Geography; Travel / General; Travel / United States / General;