Aclcnowledgements . 



The preparation of this paper has been made possible by the 

 sponsorship of the Office of Naval Research at New York University. 

 My sincere thanks are due to Professor B.Haurwitz for critical read- 

 ing the paper in manuscript form and for helpful advice during my 

 stay in the United States of America since July 1951. I greatly 

 appreciate the help of Dr.W.J.Pierson for administrative advice, and 

 the assistance of Mr. W. Marks who corrected the English of this repott 



I wish to extend my thanks to the firms F. A. Bolten, Hamburg, and 

 the Hamburg-America-Line, Hamburg, which afforded the opportunity to 

 make extensive observations at sea by permission to participate in 

 a voyage from Hamburg to the West Indies and the Gulf of Mexico 

 aboard M.S."Heidberg" . 



During my stay at Woods Hole Oceanographic Institution in summer 

 of 1951 I had the ooportunity to look into the results of some un- 

 published wave records obtained by Dr .H.R.Seiwell.For this stay and 

 the kind permission to make use of these records I am very much 

 obliged to Admiral E.H.Smith and Dr.C.O.D' Iselin of the Vv'oods Hole 

 Oceanographic Institution. 



The text of this report was typed by Mrs.Sadelle Wladaver.und 

 the figures were prepared by Mrs. Gertrude Fisher, to i^hom I am 

 indebted for their careful work. 



126 



