CONTENTS 



Page 



Report of the Secretary of the Smilhsoiiinii Instilutioii 1 



Part 1. Report on the Smithsonian Institution and all the bureaus 



under its direction except the National Museum 1 



Summary of the year's activities' 1 



The establishment 4 



The Board of Regents 4 



Finances 6 



Matters of general interest 6 



Johnson-Smithsonian Deep-Sea Expedition 6 



Removal of Gellatly Collection to Washington 7 



Martin Gustav and Caroline Runice Hanson fund 8 



Second Arthur Lecture 8 



Walter Rathbone Bacon traveling scholarship 8 



Smithsonian exhibit at the Century of Progress Exposition, 



Chicago 9 



Grants 10 



Explorations and field work 10 



Publications 11 



Library 11 



Appendix 1. Report on the National Gallery of Art 13 



2. Report on the Freer Gallery of Art 2:2 



3. Report on the Bureau of American Ethnology 27 



4. Report on the International Exchange Servici^ 34 



5. Report on the National Zoological Park 38 



6. Report on the Astrophysical Observatory 47 



7. Report on the Division of Radiation and Organisms. 51 



8. Report on the International Catalogue of Scientific 



Literal lire 54 



9. Report on the Libraiy 57 



10. Report on publications 64 



Part 2. Report on the United States National Museum 69 



Financial report of the executive committee of the Board of Regents 138 



GENERAL APPENDIX 



How the sun warms the eartli, by C. G. Abbot 149 



Gravitation in the solar system, by Ernest W. Brown 181 



Tiic structure and rotation of tiic galaxy, by J. S. Plaskett 189 



The contents of interstellar space, by C. G. AVjbot 211 



Some points in the philosophy of physics: Time, evolution, and creation, l)y 



E. A. MUne, F.R.S \ 219 



Stands science where she did?, by Ivor Thomas 239 



High voltage, by Karl T. Compton 249 



The battle of the alchemists, by Karl T. Compton __ 269 



V 



