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: Printed for Darton and Harvey in 1834 in 249 pages; Subjects: Glass; Optical instruments; Eye; Medical / Ophthalmology; Science / Optics; Technology & Engineering / Material Science; Technology & Engineering / Optics;