SCIENCE 



A WEEKLY JOURNAL DEVOTED TO THE ADVANCEMENT OF SCIENCE, PUBLISHING THE 



OFFICIAL NOTICES AND PROCEEDINGS OF THE AMERICAN ASSOCIATION 



FOR THE ADVANCEMENT OF SCIENCE. 



Editoeial Combiittee : S, Newcomb, Mathematics ; E. S. Woodward, Mechanics ; E. C. Pickering, 

 Astronomy ; T. C. Mendenhall, Physics ; R. H. Thurston, Engineering ; Ira Eemsen, Chemistry ; 

 Charles D. Walcott, Geology ; W. M. Davis, Physiography ; Henry F. Osborn, Paleon- 

 tology ; W. K. Brooks, C. Hart Merriam, Zoology ; S. H. Scudder, Entomology ; C. E. 

 Bessey, N. L. Britton, Botany ; C. S. Minot, Embryology, Histology ; H. P. Bow- 

 DITCH, Physiology ; J. S. Billings, Hygiene ; William H. Welch, Pathol- 

 ogy ; J. McKeen Cattell, Psychology ; J. W. Powell, Anthropology. 



Friday, August 2, 1901. 



CONTENTS : 



Doctorates Conferred ly American Universities 161 



A Basis of Scientific Thought: Professor CHARLES 

 Baskerville..... 165 



Formative Iluseiim Period: L. P. Gratacap 168 



Scientific Books : — 



Publications of the Japanese Earthquake Investi- 

 gation: Dr. T. C. Mendenhall. Fiirhringer 

 on the Classification and Genealogy of Reptiles : 

 O. P. Hay^. Clark on Allegany Cotinty, 3Iary- 

 land: GEORGE W. Stose 178 



Scientific Journals and Articles 182 



Discussion and Correspondence : — 



The Larynx as a Ifusical Instrument : Professor 

 E. W. Scripture 183 



Shorter Articles : — 



The Origin of Travertine Falls and Beefs: ' PRO- 

 FESSOR J. C. Branner. Pseudoscopic Vision 

 xoithout a Pseudoscope : Professor R.W. Wood. 184 



The Botanist's Journey to the Denver Ileeting of 

 the A. A. A. S. :— 



The Sand Hills of Nebraska ; The Grassy Covering 

 of the Great Plains ; Trees of the Bydherg Cot- 

 <omyoo(Z .• Professor Charles E. Bessey 185 



The American Forestry Association 188 



The American Association for the Advancement of 

 Science 1 88 



Scientific Notes and News 189 



University and Educational News 192 



DOCTORATES CONFERRED BY A3IERICAN 

 UNIVERSITIES. 



The following table, compiled from offi- 

 cial sources, gives details in regard to the 

 conferring of the degree of Doctor of Phi- 

 losophy during the past academic year : 



Yale 



Chicago... : 



Johns Hopkins 



Harvard 



Columbia 



Pennsylvania.. . 



Cornell 



Virginia 



Clark 



New York 



Wisconsin 



Columbian 



Michigan 



Princeton 



Brown 



Minnesota 



California 



Stanford 



Bryn Mawr 



Vanderbilt 



Nebraska 



Washington 



Tulane.... 



Colorado 



Kansas 



Missouri 



Syracuse 



Total 



34 



36 



33 



26 



22 



24 



19 







13 



5 



5 



1 



7 







1 



1 



1 



2 



3 







2 



























234 



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

 for review stiould be sent to the responsible editor, Pro- 

 fessor J. McKcen Cattell, Garrison-on-Hudson, N. Y. 



The table shows that the degree was con- 

 ferred on 253 candidates, an increase of 20 



