SCIENCE 



Friday, May 30, 1913 



CONTENTS 



The Joseph Leidy Lecture: — 

 Introduction : Provost Edgar F. Smith . . 809 

 A Tribute to Joseph Leidy: Professoe 



Charles S. Minot 809 



Heredity and Microscopical Research: Pro- 

 fessor Edmund B. Wilson 814 



Cliancellor Jordan and President Branner . . . 827 



The Pension Flan of the American Museum 

 of Natural History 827 



Scientific Notes and Nexvs 828 



University and Educational News 833 



Discussion and Correspondence: — 



The California Academy of Sciences: Dr. 



A. L. Kroebee. University Life in Idaho: 

 President James A. MacLean. The Cot- 

 trell Process for Depositing Dust and 

 Smohe: Professor W. S. Franklin. A 

 Local Magnetic Storm: Professor Francis 

 E. NiPHER. Plus and Minus: Professor 

 George Bruce Halsted 833 



Scientific BooTcs: — 



Abderhalden's Schutsfermente des tier- 

 ischen Organismus: Dr. J. Auer. Given's 

 Methods for Sugar Analysis: Dr. F. Gr. 

 WlECHMANN. Daugherty's Economic Zool- 

 ogy: Professor Herbert Osborn 837 



The Mineral Wealth of Canada: Dr. M. E. 

 Wadsworth 839 



Special Articles: — 



Artificial Parthenogenesis in Fucus : Dr. J. 



B. OvEETON. On the Colloid-chemical Ac- 

 tion of the Diuretic Salts: Professor Mae- 

 tin H. Fischee and Anne Stkes 841 



Societies and Academies: — 



The American Mathematical Society: Peo- 

 fessoe F. N. Cole 845 



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

 review should be sent to Professor J. McKeen Cattell, Garrison- 

 on-Hudson, N. Y. 



THE JOSEPH LEIDY LECTURE 



INTKODUCTION BY THE PROVOST OF THE 

 UNIVERSITY OP PENNSYLVANIA 



Joseph Leidy was a son of the Univer- 

 sity of Pennsylvania. As a tolcen of rever- 

 ence and affection his devoted nephew and 

 namesake, Joseph Leidy, Jr., has gener- 

 ously endowed the Joseph Leidy Memorial 

 Lectureship for the extension of scientific 

 knowledge through the medium of lectures 

 by eminent specialists. 



To-night, we meet to inaugurate this 

 foundation. Of Dr. Leidy, the great stu- 

 dent and teacher, whom many of us knew 

 and deeply honored, I would say : 



' ' The wisest man could ask no more of fate 

 Than to be simple, modest, manly, true, 

 Safe from the many, honored by the few; 

 Nothing to count in world, or church, or state, 

 But inwardly in secret to be great; 

 To feel mysterious nature ever new, 

 To touch, if not to grasp, her endless clue, 

 And learn by each discovery how to wait. 

 To widen knowledge and escape the praise; 



Wisely to teach because more wise to learn; 

 To toil for science, not to draw men's gaze, 



But for her love of self denial stern; 

 That such a man could spring from our decays 

 Fans the soul's nobler faith until it burn." 

 Edgar F. Smith 



A TRIBUTE TO JOSEPH LEIDY ^ 

 Joseph Leidy was a Philadelphian by 

 his birth, by his career and by his death, 

 and no citizen of this metropolis has more 

 deserved public honor than he. 



Leidy was born September 9, 1823, and 

 died April 30, 1891. His first scientific 

 paper was published in 1845, and his last 



' Opening address for the Joseph Leidy Founda- 

 tion delivered at the University of Pennsylvania, 

 April 17, 1913. 



