CONTENTS 



Page 



List of officials v 



General statement 1 



The Establishment 5 



The Board of Regents 5 



Finances 7 



Visitors 7 



Lectures 8 



Summary of the year's activities of the Institution 9 



Reports of branches of the Institution: 



United States National Museum 13 



Bureau of American Ethnology 29 



Astrophysical Observatory 47 



National Collection of Fine Arts 51 



Freer Gallery of Art 61 



National Air Museum 74 



National Zoological Park 93 



Canal Zone Biological Area 131 



International Exchange Service 137 



National Gallery of Art 146 



Report on the Library 159 



Report on Publications 163 



Report of the executive committee of the Board of Regents 169 



GENERAL APPENDIX 



The nature of the upper atmosphere, by H. S. W. Massey 179 



Solar influence on the earth, by John W. Evans 189 



Fifty years of flying progress, by Grover Loening 201 



Tektites and the lost planet, by Ralph Stair 217 



On comparing the brain with machines, by D. M. MacKay 231 



A glimpse of incomprehensibles, by George W. Corner 241 



The electron microscope in biology, by Ralph W. G. Wyckoff 251 



The spread of the cattle egret, by Alexander Sprunt, Jr 259 



The migration of mammals, by L. Harrison Matthews 277 



The flight of animals, by James Gray 285 



Botanical studies in Fiji, by Albert C. Smith 305 



The romance of domesticated plants, by Glenn W. Blaydes 317 



The scientific detection of crime, by Charles Sanni6 337 



The great Piltdown hoax, by William L. Straus, Jr 363 



Our State names, by John P. Harrintgon 373 



Shanidar cave, a Paleolithic site in northern Iraq, by Ralph S. Solecki 389 



Medicine, warfare, and history, by John F. Fulton 427 



Harriet Lane Johnston and the National Collection of Fine Arts, by 



Thomas M. Beggs 443 



in 



