This book, "Measures of double stars with the 40-inch refractor of the Yerkes observatory in 1900 and 1901", by S W. 1838-1921 Burnham, is a replication. 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.