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: C. Scribner's Sons in 1902 in 247 pages; Subjects: Light; Juvenile Nonfiction / Science & Nature / Physics; Science / Astronomy; Science / Light; Science / Optics; Technology & Engineering / Optics;