CONTENTS 



Page 



List of officials XI 



Outstanding events 1 



Summary of the year's activities of the branches of the Institution 2 



The estabHshment 5 



The Board of Regents 6 



Finances 7 



Matters of general interest 7 



Smithsonian radio program 7 



Rocket experiments of Dr. R. H. Goddard 8 



Walter Rathbone Bacon traveling scholarship 9 



Dr. Mozley's niollusk investigations 9 



Dr. Blackwelder's study of the staphylinid fauna of the West 



Indies 10 



Grants 11 



Fifth Arthur lecture 11 



Smithsonian Institution exhibit at the Texas Centennial Exposition, 



Dallas, Tex 12 



Smithsonian Scientific Series 13 



Bequests 14 



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 25 



3. Report on the Freer Gallery of Art 32 



4. Report on the Bureau of American Ethnology 36 



5. Report on the International Exchange Service 44 



6. Report on the National Zoological Park 53 



7. Report on the Astrophysical Observatory 76 



8. Report on the Division of Radiation and Organisms 81 



9. Report on the library 83 



10. Report on publications 91 



Report of the executive committee of the Board of Regents 97 



GENERAL APPENDIX 



Astronomy in Shakespeare's time and in ours, by C. G. Abbot 110 



The size and age of the universe, by Sir James Jeans 123 



The earth, the sun, and sunspots, by Loring B. Andrews 137 



Northern lights, by A. S. Eve 145 



Radioactivity and atomic theory, by Lord Rutherford 161 



The cryogenic laboratory at Leiden, by Robert Guillien 177 



Form, drift, and rhythm of the continents, by W. W. Watts 185 



Core samples of the ocean bottom, by Charles Snowden Piggot 207 



Some new aspects of evolution, by W. P. Pycraft 217 



V 



