FOREWORD 



The following article is a translation of a speech, based on a 

 presentation of the theory by Professor Munch-Peterson at the Academy 

 for Technical Sciences, 5 April 1938, and delivered by Mr, Sv. 

 Svendsen, Division Engineer, Statens Vandbygningsvaesen, at the annual 

 meeting of the Association of Governinent and Harbor Engineers, held 

 27 August 1938 at Helsingf ors „ llbcs, Valfrid Palengren Sfunch-Petersen 

 Petersen's widow, has kindly granted permission for translation and 

 publication of the article . The original article was translated at 

 the University of California, and the permission of the University to 

 publish the translation is acknowledged. 



No previously published English translations of this inqportant 

 treatment are known. Despite the long interval since original publ- 

 ication it is believed that Professor Munch-Petersen's study of the 

 problem of littoral drift is of sufficient importance to beach and 

 shorfe protection engineering to justify its present publication in 

 English, The translation has been edited freely in the interest of 

 economy of space and for easier understanding of the reasoning. 



