OPEN COURT and the above logo are registered in the U.S. Patent & Trademark Office.
Published 1985 by Open Court Publishing Company, Peru, Illinois 61354.
This edition first published 1951 by Routledge & Kegan Paul Limited, London.
Second printing 1988
Third printing 1990
Fourth printing 1993
Fifth printing 1996
Printed and bound in the United States of America.
Library of Congress Cataloging-in-Publication Data