The theory of modern optical instruments a reference book for physicists, manufacturers of optical instruments, and for officers in the Army and Navy This book, "The theory of modern optical instruments a reference book for physicists, manufacturers of optical instruments, and for officers in the Army and Navy", by Alexander Wilhelm Gleichen, is a replication of a book originally published before 1921. 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.