SOLE DISTRIBUTORS FOR THE UNITED STATES AND CANADA 



AMERICAN ELSEVIER PUBLISHING COMPANY, INC. 



52 Vanderbilt Avenue, New York 17, N.Y. 



Library of Congress Catalog Card Number 62-10363 



With 36 illustrations and 6 tables 



ALL RIGHTS RESERVED 



THIS BOOK OR ANY PART THEREOF MAY NOT BE REPRODUCED IN ANY FORM 



(including PHOTOSTATIC OR MICROFILM FORM ) 



WITHOUT WRITTEN PERMISSION FROM THE PUBLISHERS 



PRINTED IN THE NETHERLANDS BY 

 CENTRALE DRUKKERIJ, NIJMEGEN 



