This reproduction was printed from a digital file created at the Library of Congress as part of an extensive scanning effort started with a generous donation from the Alfred P. Sloan Foundation. The Library is pleased to offer much of its public domain holdings free of charge online and at a modest price in this printed format. Seeing these older volumes from our collections rediscovered by new generations of readers renews our own passion for books and scholarship.

Originally published in 1921. This volume from the Cornell University Library's print collections was scanned on an APT BookScan and converted to JPG 2000 format by Kirtas Technologies. All titles scanned cover to cover and pages may include marks notations and other marginalia present in the original volume.

This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.