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. 



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

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

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

 tology ; W. K. Brooks, C. Haht Merriam, Zoology ; S. H. Scuddbr, 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, 

 Pathology ; J. McKeen Cattell, Psychology. 



Friday, November 14, 1902. 



CONTENTS: 



Address to the Engineering Section of the 

 British Association: Professor John 

 Peeey 761 



In Memory of John Wesley Powell: Professor 

 S. P. Langley, Richard Rathbun, Dr. W. 

 H. Dall, Dr. D. C. Oilman, Dr. Charles 

 D. Walcott, Commissioner W. T. Harris, 

 Marcus Baker, Dk. W J McGee 782 



Scientific Books: — 



Heusler's Chemistry of the Terpenes: Pro- 

 fessor Edward Kremers 790 



Societies and Academies: — 



The American Mathematical Society: Pro- 

 fessor F. N. Cole 791 



Discussion and Correspondence: — 



The Carnegie Institution : Dr. C. H. Eigen- 

 MANN. Section H, Anthropology, of the 

 American Association for the Advancement 

 of Science: Roland B. Dixon 792 



Shorter Articles: — 



Exceptions to Mendel's Laio: W. J. Spill- 

 man 794 



Notes on Inorganic Chemistry : J. L. H 796 



The Comet B, 1902, and the Mass of Mercury : 

 Professor Edward C. Pickering 797 



Scientific Notes and News 798 



University and Educational News 800 



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

 for review Bliould be sent to tlie responsible editor. Pro- 

 fessor .1. McKeen Cattell, Garrison-on-Hudson, N. Y. 



ADDRESS TO TEE ENGINEERING SECTION 

 OF THE BRITISH ASSOCIATION.* 



This Section lias had sixty-six presi- 

 dents, all different types of engineer. As 

 each has had perfect freedom in choosing 

 the subject for his address, and each has 

 known of the rulef that presidential ad- 

 dresses are not subject to debate after- 

 wards, and as, being an engineer, he has 

 always been a man of originality, of course 

 he has always chosen a subject outside his 

 own work. An engineer knows that the 

 great inventions, the great suggestions of 

 change in any profession, come from out- 

 siders. Lawyers seem like fish out of water 

 when trying to act as law-makers. The 

 radical change that some of us hope to see 

 before we die in the construction of loco- 

 motives will certainly not come from a 

 locomotive superintendent, who cannot im- 

 agine a locomotive which is not somehow 

 a lineal descendant of the Rocket. 



Hence it is that in almost every case the 

 President of this Section has devoted a 

 small or large part of his address to the 

 subject of the education of engineers. I 

 grant that every president has devoted his 

 life to the education of one engineer— him- 



• Given at the Belfast meeting. 



t The Committees of Sections G and L have 

 arranged a discussion on ' The Education of Engi- 

 neers,' this address being regarded as opening the 

 discussion. Thus the rule is not in force this 

 year. 



