Elements of optical mineralogy an introduction to microscopic petrography, with description of all minerals whose optical elements are known and tables arranged for their determination microscopically This book, "Elements of optical mineralogy an introduction to microscopic petrography", by N.H. Winchell, is a replication of a book originally published before 1909. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.