CONTENTS 



Page 



List of officials ix 



The Smithsonian and the war 1 



Ending of Wright-Smithsonian controversy 4 



Summary of the year's activities of the branches of the Institution 4 



The establishment 9 



The Board of Regents 9 



Finances 10 



Matters of general interest 10 



Smithsonian radio program 10 



Walter Rathbone Bacon scholarship 12 



Eleventh Arthur lecture 13 



Explorations and field work 14 



Publications 15 



Library 16 



Appendix 1. Report on the United States National Museum 17 



2. Report on the National Gallery of Art 29 



3. Report on the National Collection of Fine Arts 39 



4. Report on the Freer Gallery of Art 44 



5. Report on the Bureau of American Ethnology 49 



G. Report on the International Exchange Service 61 



7. Report on the National Zoological Park 70 



8. Report on the Astrophysical OVjservatory 79 



9. Report on the Division of Radiation and Organisms 83 



10. Report on the library 86 



11. Report on publications 91 



Report of the executive committee of the Board of Regents 99 



GENERAL APPENDIX 



The 1914 tests of the Langley "aerodrome," by C. G. Abbot 111 



The problem of the expanding universe, by Edwin Hubble 119 



Galaxies, by Ilarlow Shapley 133 



Is there life on tlie other worlds? by Sir James Jeans 145 



Solar radiation and the state of the atmosphere, by Harlan True Stetson 151 



The sun and the earth's magnetic field, by J. A. Fleming 173 



Ultraviolet light as a sanitary aid, by Louis Gershenfeld 209 



Trends in petroleum geology, by A. I. Levorsen 227 



Meteorites and their metallic constituents, by E. P. Henderson and Stuart 



H. Perry 235 



Philippine tektites and the tektite problem in general, by H. Otley Beyer 253 



Chemical properties of viruses, by W. M. Stanley 261 



Industrial development of synthetic vitamins, by Randolph T. Major 273 



The nutritional requirements of man, by C. A. Elvehjem 289 



V 



