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. Original Publisher: [Princeton, N.J., Princeton University Press; Publication date: 1914; Subjects: Educational psychology; Mental tests; Educational tests and measurements; Psychological tests; Puzzles; Education / Educational Psychology; Education / Testing