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.

With discussion on how paper conservation procedures work, how they are put to use, and how deterioration may be prevented, this comprehensive volume examines how vast quantities of documentation can best be preserved. It provides detailed information and recommendations about various preservation methods, including mechanical copying, photographic film, magnetic recording, and optical disk recording, and on the expected useful lives of each. Also included are a method for scoring and assessing the condition of collections and a decision tree that provides a guide for orderly progress in preserving a collection of documents. Printed on permanent, acid-free paper.