SCIENCE 



Editorial Committed : S. Newcomb, Mathematics ; R. S. Woodward, Mechanics ; E. C. Pickering ; 



Astronomy; T. C. Mendbnhall, Physics; R. H. Thurston, Engineering; Iba Remsen, Chemistry; 



J. Lb CoNTE, Geology; W. M. Davis, Physiography; Henry F. Osboen, Paleontology; W. K. 



Beooks, C. Hart Mereiam, Zoology; S. H. Scuddee, Entomology; C. E. Bessby, N. L. 



Beitton, Botany; C. S. Minot, Embryology, Histology; H. P. Bowditch, Physiology; 



J. S. Billings, Hygiene; J. McKeen Cattbll, Psychology; 



J. W. Powell, Anthropology. 



Friday, Maeoh 2, 1900. 



CONTENTS: 



Psychology and Social Practice : Peofbssoe John 

 Dewby 321 



The Marine Biological Laboratory : Peofessok E. 



G. CONKLIN 333 



Eeport on the Initial Work of the State Geological 

 Survey of Nebraska : Professor Erwin Hinck- 

 ley Baeboue 343 



Scientific Books : — 



Kingsley's Vertebrate Zoology : PROFESSOR 

 Jacob Ebighaed. FolweU's Water-Supply En- 

 gineering ; Hazen's Filtration of Public Water 

 Supplies: PROFESSOR Mansfield Mbeei- 

 MAN. Benjamin on California Blines and 3Iiner- 

 als: R. H. T. Books Received 344 



Scientific Journals and Articles 348 



Societies and A cademies : — 



Geological Society of Washington : F. L. Ran- 

 SOME, David White. Biological Society of 

 Washington : T. W. STANTON. Tlie Philosoph- 

 ical Society of Washington: E. D. Preston. 

 Torrey Botanical Club : EDWARD S. BURGESS. 

 2he New York Section of the American Chemical 

 Society : Dr. Durand Woodsian. The Acad- 

 emy of Science of St. Louis : PROFESSOR Wil- 

 liam Trelease 348 



Notes on Physics : — 



Drude's Annalen ; Radiant Heat ; Thermal Con- 

 ductivity. W. B. P 352 



Engineering Notes : R. H. T 353 



Botanical Notes : — 



Botany at Wood's Roll; Minnesota Botanical 

 Studies ; Harper's Studies in Cell Dieision ; Short 

 Notes: Professor Charles E. Bessey 354 



Scientific Notes and News 356 



University and Educational News : — 

 Instruction in Archaeology and Ethnology in the 

 University of Pennsylvania. General 359 



MSS. intcDded for publication and books, etc., intended 

 for review should be sent to the responsible editor, Profes- 

 sor, J. McKeen Cattell, Garrisou-on-Hudson, N. Y. 



PSYCHOLOGY AND SOCIAL PRACTICE.* 

 In coming before you I had hoped to deal 

 with the problem of the relation of psychol- 

 ogy to the social sciences — and through 

 them to social practice, to life itself. Nat- 

 urally, in anticipation, I had conceived a 

 systematic exposition of fundamental prin- 

 ciples covering the whole ground, and giv- 

 ing every factor its due rating and position. 

 That discussion is not ready to-day. I am 

 loath, however, completely to withdraw 

 from the subject, especially as there hap- 

 pens to be a certain phase of it with which 

 I have been more or less practically occu- 

 pied within the last few years. I have in 

 mind the relation of Psychology to Educa- 

 tion. Since education is primarily a social 

 affair, and since educational science is first 

 of all a social science, we have here a sec- 

 tion of the whole field. In some respects 

 there maj' be an advantage in approaching 

 the more comprehensive question through 

 the medium of one of its special cases. The 

 absence of elaborated and coherent views 

 may be made up for by a background of ex- 

 perience, which shall check the projective 

 power of reflective abstraction, and secure 

 a translation of large words and ideas into 

 specific images. This special territory, 

 moreover, may be such as to afiford both 

 sign-posts and broad avenues to the larger 



* Address of the President of the American Psycho- 

 logical Association, New Haven meeting, December, 

 1899. 



