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 the publisher's website (GeneralBooksClub.com). You can also preview excerpts of 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: Boston: H.O. Houghton and Company; New York: Hurd and Houghton in 1875 in 41 pages; Subjects: Medical geography; United States; Medical / Epidemiology; Medical / Pathology; Medical / Public Health;