VI CONTENTS. 



The Smithsonian Institution — Continued. Page. 



International Catalogue of Scientific Literature 17 



Gallery of Art 18 



The Children's Room 19 



Correspondence - 20 



Cooperation of Executive Departments 21 



Expositions 21 



International Couf^ress of Orientalists -1 



Standards of color 22 



National Standardlziiiij Bureau 2'.] 



Proposed Chalcedony I*ark 2H 



M iscellaneous : 



Gifts --- 26 



Sinithson Tablet - 26 



Foreign Institutions 26 



National Museum 26 



Bureau of American Ethnology - - - - - 30 



International Exchanges 31 



National Zoological Park 43 



Astroi)hysical Olwervatory - 45 



Necrology 47 



Appendix I . Report ( m National Museum 51 



II. Report on Bureau of American p]thnoIog3' 59 



III. Report on International Exchanges 73 



IV. Report on National Zoological Park 85 



V. Re])ort on Astrophysical 01)ser\'atory _ 99 



VI. Report of the Librarian 110 



VII. Rei.ort of the Editor. 112 



(tENERAL APPENDIX. 



Progress in Astronomy during the Nineteenth Century, by Sir Norman Lockyer. 123 

 A Preliminary Account of the Solar Eclipse of May 28, 1900, as observed by 



the Smithsonian Expedition, by S. P. Langley 149 



Notes on Mars, by Sir Rol)ert Ball and others 157 



On Solar (Changes of Temi)erature and Variations in Rainfall in the Region 



Surrounding thi> Indian Ocean, by Sir Norman Lockyer 173 



The I'ekin Observatory 185 



The Prf)gress of Aeronautics, I >y .h Janssen 187 



Ivord Rayleigh on Flight 195 



The Langley Aerodrome 197 



The Zeppelin Air Ship ^17 



The Use of Kites to Obtain Meteorological Observations, by A. Lawrence 



Rotch 223 



I'rogress in Chemistry during the Nineteenth Century, by Prof. William 



Ramsay 233 



Licjuid Hydrogen, by Prof. James Dewar 259 



A Century of Cieology, by Prof. Joseph Le Conte 265 



Evolutional (ieology, 1 )y Prof. W. J. SoUas 289 



Progress in Physics in the Nineteenth Century, l)y Prof. T. C. Mendenhall . . 315 



Electricity during the Nineteenth Century, by Prof. Elihu Thomson 333 



The Photography of Sound Waves, by Prof. R. W. Wood 359 



Unsuspected Radiations, 1 )y Prince Kr( )])( >( kin 371 



