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: Office of Critical Tables, National Academy of Sciences, National Research Council in 1961 in 84 pages; Subjects: Science; Technology; Education / Teaching Methods & Materials / Science & Technology; Reference / Research; Science / General; Science / History; Science / Research & Methodology; Science / Study & Teaching; Science / Philosophy & Social Aspects; Technology & Engineering / Social Aspects;