Copyright, 1946, by 

 THE MAC MIL LAN COMPANY 



All rights reserved — no part of this hook 

 may be reproduced in any form without 

 permission in writing from the publisher, 

 except by a reviewer who wishes to quote brief 

 passages in connection with a review written 

 for inclusion in magazine or newspaper. 



FIRST PRINTING 



LITHOGRAPHED IN THE UNITED STATES OF AMERICA 



