Copies 



Directeur du Bassin d' Essais Des Carenes, 6, Boulevard Victor, 

 Paris XV, France 



Director, Swedish State Shipbuilding Experimental Tank, Goteborg 24, 

 Sweden 



Dr. G. Hughes, National Physical Laboratory, Teddington, Middlesex, 

 England 



Editor, Journal of the British Shipbuilding Research Association, 

 5, Chesterfield Gardens, Curzon St., London W. 1, England 



Editor, Physics Abstracts, Institution of Electrical Engineers, 

 Savoy Place, London W.C. 2, England 



Editor, Index Aeronauticus, Ministry of Supply, Millbank, London 

 S.W. 1 , England 



Head, Aerodynamics Department, Royal Aircraft Establishment, 

 Parnborough, Hants, England 



Head, Aerodynamics Division, National Physical Laboratory, Teddington, 

 Middlesex, England 



Head, Aeronautics Department, Imperial College, London, S.W. 7, 

 England 



Head, College of Aeronautics, Cranfield, Bletchley, Bucks, England 



Prof. J. Kampe' de Fe'riet, Paculte' des Sciences, Universite' de Lille, 

 Lille (Nord), France 



Directeur, Laboratoire Dauphinois d'Hydraulique des Ateliers Neyrpic , 

 Avenue de Beauvert, Grenoble (Isere), France 



Office National d 1 Etudes et de Recherches Aeronautiques 3, rue Leon 

 Bonnat, Paris XVI, France 



Prof. D.P. Riabouchinsky, Centre National de la Recherche 

 Scientifique, 13 Quai d 1 Or say, Paris VII, France 



Prof. J.M. Burgers, Laboratorium Voor Aero-En Hydrodynamica , Nieuwe 

 Laan ~]6, Delft, The Netherlands 



Dr. R. Timman, National Luchtvaartlaboratorium, Sloterwag 14-5, 

 Amsterdam, The Netherlands 



Director, Aeronautical Research Institute of Sweden, Ranhammarsvagen 

 12, Ulsvunda, Sweden 



Prof. J. Acker et, Institut fur Aerodynamik Der Eidgenossiche 

 Technische Hochschule, Zurich, Switzerland 



Dr. L. Malavard, Office National d' Etudes et de Recherches Aero- 

 nautiques, Chatillon, Paris, France 



