VI CONTENTS, 



Page. 

 The Smithsonian Institution — Continued. 



Library : 15 



Correspondence 15 



Miscellaneous 15 



National Museum - - 16 



Bureau of American Ethnology IS 



International Exchanges 20 



National Zoological Park ■ 21 



Astrophysical Observatory 22 



Appendixes: 



I. Eeport on the United States National Museum 25 



II. Report on the Bureau of American Ethnology 34 



III. Report on the International Exchange Service 49 



IV. Report on the National Zoological Park 65 



V. Report on the Astrojihysical Observatory — 76 



VI. Report of the Li])rarian 85 



VII. Report of the Editor 89 



GENERAL APPENDIX. 



General Description of the Moon, l)y Prof. N. S. Shaler 103 



The Pressure Due to Radiation, by E. F. Nichols and G. F. Hull 115 



The Sun-spot Period and the Variations of the Mean Annual Temperature of 



the Earth, by Dr. Ch. Nordmann 13i) 



Methods of Forecasting the Weather, by Prof. J. M. Pernter 151 



Progress with Air Ships, by Maj. B. Baden-Powell 167 



Aerial Navigation, Ijy O. Chanute 173 



Graham Bell's Tetrahedral Kites 183 



Radium, by E. Curie 187 



Radium, by J. J. Thomson 199 



Experiments in Radio-Activity and the Production of Helium from Radium, 



by Sir William Ramsay and Mr. Frederick Soddy 203 



The " N " Rays of M. Blondlot, by C. G. Abbot 207 



Modern Views on Matter, by Sir Oliver Lodge 215 



Modern Views on Matter: the Realization of a Dream, l)y Sir William Crookes. 229 



The Atomic Theory, by Prof. F. W. Clarke 243 



Intra-atomic Energy, b}^ Gustave Le Bon 263 



The Electric Furnace, by J. Wright 295 



High-speed Electric Interurban Railways, by George H. Gibson 311 



The Marienfelde-Zossen High-speed Electric Railway Trials, by Alfred Gra- 



den witz 323 



The Beginnings of Photography, by Maj. Gen. J. Waterhouse 333 



The Relations of Geology, by Prof. Charles Lapworth 363 



Terrestrial Magnetism in its Relation to Geography, by Capt. E. W. Creak 391 



An Exploration to Mount McKinley, by Alfred H. Brooks . ..^ 407 



North Polar Exploration, 1898-1902, by Commander R. E. Peary 427 



First Year's work of National Antarctic Expedition, by Sir Clements R. 



Markham. 459 



The Swedish Antarctic Expedition, by Otto Nordenskiold and others 467 



Food Plants of Ancient America, by O. F. Cook 481 



Desert Plants as a Source of Drinking Water, by Frederick V. Coville 499 



A New Theory of the Origin of Species, by A. Dastre 507 



