The book has no 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. Volume: 27; v. 100; Original Publisher: Macmillan; Publication date: 1869; Subjects: Genius; Heredity, Human; Heredity; Intellect; Medical / Genetics; Psychology / General; Psychology / Cognitive Psychology; Science / Life Sciences / Evolution; Science / Life Sciences / Genetics