Copyright, 1954, by Yale University Press. 

 Printed in the United States of America by 

 Vail-Ballou Press, Inc., Binghamton, New York. 

 All rights reserved. This book may not be 

 reproduced, in whole or in part, in any form 

 (except by reviewers for the public press), 

 without written permission from the publishers. 

 Library of Congress catalog card number: 54-9521 



