CONTENTS 



Page 



List of officials v 



General statement 1 



The Establishment 5 



The Board of Regents 6 



Finances 7 



Visitors 7 



Lectures 9 



Award of Langley medal 9 



Dr. Abbot honored 10 



Funds for the Institution 10 



Bio-Sciences Information Exchange 11 



Organization and staff 11 



Summary of the year's activities of the Institution 12 



Reports of branches of the Institution: 



United States National Museum 16 



Bureau of American Ethnology 36 



Astrophysical Observatory 60 



National Collection of Fine Arts 64 



Freer Gallery of Art 76 



National Air Museum 88 



National Zoological Park 104 



Canal Zone Biological Area 129 



International Exchange Service 136 



National Gallery of Art 145 



Report on the library 157 



Report on publications 160 



Report of the executive committee of the Board of Regents 167 



GENERAL APPENDIX 



Science serving the Nation, by Lee A. DuBridge 177 



The development of nuclear power for peaceful purposes, by Henry D. 



Smyth 189 



The time scale of our universe, by E. J. Opik 203 



Solar activity and its terrestrial effects, by Sir Harold Spencer Jones 227 



Forty years of aeronautical research, by J. C. Hunsaker 241 



A transatlantic telephone cable, by H. A. AfFel 273 



Genetics in the service of man, by Bentley Glass 299 



Cultural status of the South African man-apes, by Raymond A. Dart 317 



The history of the mechanical heart, by George B. Griff enhagen and 



Calvin H. Hughes 339 



III 



