SCIENCE 



FRffiAY, Mat 19, 1916 



CONTENTS 

 Teaching and Practise: Professor William 

 Sydney Thayeb 691 



Tfte Work of the Jefferson Physical Labora- 

 tory : Propessor Theodore Lyman 706 



Scientific Notes and News 708 



University and Educational News 711 



Discussion and Correspondence: — 



Age of the Tuxpam Beds: Dr. E. T. 

 DuMELE. Niter Spots: Walter Stalder. 712 



Scientific Boohs : — 



Miller's Sistorical Introduction to Mathe- 

 matical Literature: Professor Florian 

 Cajori. Beacall and Challenger on Dye- 

 stuffs and Coal Tar Products: L. A. Olney. 713 



Proceedings of the National Academy of Sci- 

 ences: Professor Edwin Bidwbll Wilson. 714 



Special Articles: — 



The Kata Thermometer as a Measure of the 

 Effect of Atmospheric Conditions upon Bod- 

 ily Comfort: Professor C.-E. A. Winslow. 716 



The American Philosophical Society: Pro- 

 fessor Arthur W. Goodspeed 719 



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

 reyiew aliould be sent to Professor J. MoKeen Cattell, Garrison- 

 on-Hudson. N. Y. 



TEACHING AND PRACTISE i 



It would be impossible to address this 

 congress without a word of affectionate trib- 

 ute to the memory of three great men who 

 have presided over these meetings in years 

 that have passed, figures, alas, that we shall 

 not see again. 



Fitz, the patient, discriminating student, 

 the wise, inspiring teacher, whose keen eye 

 and orderly mind shed light upon obscure 

 corners of the art of medicine ; Mitchell, the 

 poet, the brilliant physiologist, the acute 

 and sympathetic reader of men 's minds, the 

 great practitioner; Trudeau, the optimist 

 who, in his long journey through the 

 "valley of the shadow of death," led so 

 great an army of sufferers to the land of 

 light. 'Tis a heavy loss. But what a varied 

 and lasting inspiration the lives of these 

 men have left for us and for the world ! 



In the last several years, especially 

 through the activities of the American Med- 

 ical Association, the Carnegie Institution 

 and the General Education Board, questions 

 relating to medical education have been dis- 

 cussed very actively in America, and the 

 changes and improvements in our methods 

 of teaching and in the character and train- 

 ing of those who teach have been greater 

 probably than in any other like period in 

 the history of American medicine. 



The relations between teaching and prac- 

 tise in hospital and in university have of 

 late been the subject of especially vigorous 

 controversy in this as in other countries. 

 To one who for five and twenty years has 



1 Address of the president of the Congress of 

 American Physicians and Surgeons delivered at 

 Washington on May 9. 



