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: D. Van Nostrand in 1922 in 136 pages; Subjects: Geometry, Descriptive; Mathematics / Calculus; Mathematics / Differential Equations; Mathematics / Geometry / General; Mathematics / Pre-Calculus; Mathematics / Mathematical Analysis; Mathematics / Functional Analysis;