VI CONTENTS. 



The Smithsonian Institution — Continued. Page. 



Explorations - 11 



Publications 12 



Library 14 



Correspondence - 15 



International Congresses 16 



Expositions 17 



American Historical Association - 18 



Miscellaneous 18 



National Museum 19 



Bureau of American Etbnology 22 



International Exchanges 23 



National Zoological Park 26 



Astrophysical Observatory - 28 



Necrology 29 



Appendix I. Eeport on the National Museum 31 



II. Report on the Bureau of American Ethnology 36 



III. Eeport of the Curator of Exchanges 49 



IV. Report of the Superintendent of the National Zoological Park 62 

 V. Report on the Astropbysical Observatory 69 



VI. Report of the Librarian 75 



VII. Report of the Editor 79 



VIII. Report on the Tennessee Centennial Exposition 90 



GENERAL APPENDIX. 



Recent Progress accomplished by aid of Photography in the study of the 



Lunar Surface, by MM. Loewy and Puiseux 105 



The Function of Large Telescopes, by George E. Hale 123 



The Le Sage Theory of Gravitation, by M. Le Sage, with Introduction by 



S. P. Langley 139 



The Extreme Infra-Red Radiations, by C. E. Guillaume 161 



The Chemistry of the Stars, by Norman Lockyer 1 67 



The Perception of Light and Color, by George Lechalas - 179 



Some Curiosities of Vision, by Shelford Bidwell 197 



Progress in Color Photography, by G. H. Niewenglowski 209 



The Development of Electrical Science, by Thomas Gray 217 



Telegraphy Across Space, by Silvanus P. Thompson 235 



Signaling Through Space Without Wires, by W. H. Preece 249 



Note on the Liquefaction of Hydrogen and Helium, by James Dewar 259 



The Recently Discovered Gases and Their Relation to the Periodic Law, by 



William Ramsay 267 



The Kinetic Theory of Gases and Some of Its Consequences, by William Ram- 

 say 277 



The Revival of Inorganic Chemistry, by H. N. Stokes 289 



Scientific Ballooning, by John M. Bacon 307 



The Tundras and Steppes of Prehistoric Europe, by James Geikie 321 



Modification of the Great Lakes by Earth Movement, by G. K. Gilbert 349 



The Plan of the Earth and Its Causes, by J. W. Gregory 363 



Funafuti: The Story of a Coral Atoll, by W. J. Sollas 389 



Oceanography, by J. Thoulet 407 



Tha Relation of Plant Physiology to the Other Sciences, by Julius Wiesner.. 427 

 Pithecanthropus erectus — A Form from the Ancestral Stock of Mankind, by 



Eugene Dubois 445 



