SCIENCE 



Editorial Committee : S. Nbwcomb, Mathematics ; E. S. Woodward, Mechanics ; E. C. Pickering, As- 

 tronomy ; T. C. Mendknhall, Physics ; R. H. Thurston, Engineering ; Ira Eemsen, Chemistry ; 

 J. Le Conte, Geology; W. M. Davis, Physiography; O. C. Marsh, Paleontology; W. K. Brooks, 

 Invertebrate Zoology ; C. Hart Merriam, Vertebrate Zoology ; S. H. Scuddee, Entomology ; 

 N. L. Beitton, Botany ; Heney F. Osboen, General Biology ; H. P. Bowditch, 

 Physiology ; J. 8. Billings, Hygiene ; J. McKeen Cattell, Psychology ; 

 Daniel G. Beinton, J. W. Powell, Anthropology ; 

 G. Brown Goode, Scientific Organization. 



Fbiday, February 21, 1896. 



CONTENTS: 



Buxley and Ms Work: Theo. Gill 253 



Certitudes and lUmions : J. W. Powell 263 



Notes on the Density and Temperature of the Waters 

 of the Gulf of ilexico and Gulf Stream : A. LlN- 



DENKOHL 271 



An Optical Illusion : Che. Ladd Feanklin 274 



Current Notes on Physiography : — 



The Tertiary Peneplain in Missouri; High Level 

 Gravels of Kentucky; Cloud-burst Tracks and 

 Water Gaps in A labama ; Massanutten Mountain, 

 Virginia: W. M. Davis 275 



Current Notes on A nthropology : — 

 Ethnographic Surveys; The Early Use of Metals 

 in Europe ; The Monuments of Yucatan : D. G. 

 Beinton .277 



Scientific Notes and News : — 



A Permanent Scientific Head for the U. S. Depart- 

 ment of Agriculture; Astronomy: H. J. Har- 

 vard College Observatory; General 278 



University and Educational News 283 



Correspondence : — 

 American Judgments of American Astronomy : S. 

 Newcomb. The Perturbations of 70 Ophiuchi: 

 T. J. J. See. Psychology of Number: John 

 Dewey. Does the Private Collector make the 6esJ 

 Museum Administrator ? F. A. Lucas 284 



Scientific Literature: — 



Hertwig's Lehrbuch der Entwicklungsgesehichte des 

 Menschen und der Wirbelthiere : C. S. Minot. 

 Bye^s Handbook of the British Macro- Lepidoptera : 

 Samuel Henshaw. Whitfield's Mollusca and 

 Crustacea of the Miocene Formations of New 

 Jersey: W. B. Clark 289 



Societies and Academies :— 



The Philosophical Society of Washington : W. C. 

 WlNLOCK. Entomological Society of Washing- 

 ton : L. O. Howard. Geological Society of 

 Washington ; Tlie National Geographic Society : 

 W. F. Moesell. Boston Society of Natural His- 

 tory : Samuel Henshaw. 27ie Torrey Botan- 

 ical Club : H. H. EUSBY 292 



New Books 296 



MSS. intended for publication and boobs etc., intended 

 for review should be sent to the responsible editor, Proi. J. 

 McKeen Cattell, Qarrison-on-Hudson, N. Y. 



HUXLEY AND HIS WORK* 

 I. 

 The history of scientific progress has been 

 marked by a few periods of intellectual fer- 

 mentation when great bounds have been 

 taken forwards and a complete revolution 

 ensued. Very few have been such, but in 

 one the name of Huxley must be ever con- 

 spicuous. It was as a lieutenant of the 

 organizer of that revolution that he ap- 

 peared, but unquestionably without him it 

 would have been long delayed, and it was 

 through his brilliant powers of exposition 

 that the peoples of the English speaking 

 lineage soon learned to understand, to some 

 extent, what evolution was and, learning, 

 to accept it. 



On the 4th of May, 1825, was born 

 the infant Huxley, in due course christened 

 Thomas Henry. " It was," Huxley himself 

 has remarked, " a curious chance that my 

 parents should have fixed for my usual 

 denomination upon the name of that par- 

 ticular apostle with whom I have al- 

 ways felt most sympathy." In his physi- 

 cal and mental peculiarities, he was com- 

 pletely the ' son of his mother,' whose 

 most distinguishing characteristic was 

 ' rapidity of thought;' that characteristic 

 Huxley claimed to have been passed on to 

 ^him 'in full strength,' and to have often 

 ' stood him in good stead,' and to it he was 



* A memorial address given on January 14th before 

 the Scientific Societies of WashiiiErtoii, 



