VI CONTENTS. 



The Smithsonian Institution — Continued. P&ge. 



Explorations 13 



Publications 1-1 



Library 15 



Correspondence 16 



International Congresses 17 



Expositions 19 



Miscellaneous: 



Documentary history 19 



Gifts and bequests 19 



Foreign institutions 19 



National Museum 20 



Bureau of American Ethnology 21 



International Exchanges 21 



National Zoological Park 22 



Astrophysical Observatory 24 



Necrology 25 



Appendix I. Report on the National Museum 28 



II. Report on the Bureau of American Ethnology 34 



III. Report on the International Exchanges 43 



IV. Report of the Superintendent of the National Zoological Park. . . 54 

 V. Report on the Astrophysical Observatory 68 



VI. Report of the Librarian 74 



VII. Report of the Editor 75 



VIII. Report on the Omaha Exposition 82 



GENERAL APPENDIX. 



The Wave Theory of Light: Its influence on Modern Physics, V)y A. Cornu .. 93 



Tlie Motion of a Perfect Liijuid, 1 )y H. S. Hele-Shaw 107 



The Field of Experimental Research, by Elihu Thomj)son 119 



Liquid Hydrogen, by Professor Dewar 131 



Some of the Latest Achievements of Science, by Sir William Crookes 143 



An Experimental Study of Radio-Active Substances, by H. C. Bolton 155 



The Growth of Science in the Nineteenth Century, by Sir Michael Foster 163 



Sir William Crookes on Psychical Research 185 



Survey of that part of the Range of Nature's Operations which Man is C'om- 



petent to study, 1 jy G. Johnstone Stoney 207 



On Lord Kelvin's Address on The Age of the Earth as an Abode fitted for Life, 



by T. C. Chamberlain ''.' 223 



An Estimate of the Geological Age of the Earth, by J. Joly 247 



The Petrified Forests of Arizona, by Lester F. Ward 289 



Present Condition of the Floor of the Ocean; Evolution of the Continental 



and Oceanic Areas, by Sir John Murray 309 



Relation of Motion in Animals and Plants to the Electrical Phenomena which 



are Associated with it, by J. Burdon-Sanderson 329 



The Truth about the Mammoth, by Frederic A. Lucas 353 



Mammoth Ivory, by R. Lydekker 361 



On the Sense of Smell in Birds, by M. Xavier Raspail 367 



Have Fishes Memory, by L. Edinger 375 



Scientific Thought in the Nineteenth Century, by William North Rice 395 



The Garden and its Development, by Paul Falkenberg 403 



