Essentials for the microscopical determination of rock-forming minerals and rocks in thin sections. This book, "Essentials for the microscopical determination of rock-forming minerals and rocks in thin sections. Volume 2", by Albert Johannsen, is a replication of a book originally published before 1922. 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.