SCIENCE 



FEmAY, January 21, 1910 



CONTENTS 



The American Association for the Advance- 

 ment of Science: — 

 Engineering as a Profession and its Rela- 

 tion to the American Association for the 

 Advancement of Science : Peofessob Geohge 



F. Swain 81 



The Chemical Regulation of the Processes 

 of the Body iy Means of Activators, Kinases 

 mid Hormones: Pkofbssoe William H. 

 Howell 93 



Sir William Crookes: Peofessok Chables 

 Baskebville 100 



The International American Congress of 

 Medicine and Hygiene 103 



Scientific Notes and News 104 



University and Educational Neics 108 



Discussion and Correspondence: — 



International Langiiage: Peofessoe Otto 

 Jespeesen. Scientists and Esperanto : J. D. 

 Hailman. Relativity and some of its Con- 

 sequences: Peofessor Feancis E. Niphee. 

 " Geometrical " Canals on Mars? — A Sug- 

 gestion: Peofessoe R. G. Aitken 109 



Scientific Books: — 



Davidson on the Human Body and Health: 

 Peofessoe Thomas A. Stoeey. Lepidop- 

 tera Phalwnw: De. Haeeison G. Dtab . . 115 



Scientific Journals and Articles 117 



The American Mathematical Society: Peo- 

 fessoe F. N. Cole 1 18 



Societies and Academies: — 



The Society for Experimental Biology and 

 Medicine: Dk. Eugene L. Opie. The Acad- 

 emy of Science of St. Louis: Maet J. Klem. 

 The American Chemical Society — New York 

 Section: De. C. M. Joyce, Rhode Island 

 Section: Albert W. Claflin 119 



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

 review should be sent to the Editor of Sciekce, Garrison-on- 

 Uudson. N. Y. 



THE AMERICAN ASSOCIATION FOR THE 



ADVANCEMENT OF SCIENCE 

 ENGINEERING AS A PROFESSION AND ITS 

 RELATION TO THE AMERICAN ASSO- 

 CIATION FOR THE ADVANCEMENT 

 OF SCIENCE^ 



In considering what should be the topic 

 of my brief address as retiring Vice-presi- 

 dent of Section D of this association, the 

 question of the relation of the profession 

 of engineering to this association has been 

 forcibly brought before my mind. A 

 number of engineering subjects of interest 

 suggested themselves, in regard to which I 

 might perhaps be able to present to you 

 ideas more or less novel and interesting; 

 but all these subjects seemed, upon consid- 

 eration, better suited to one of the profes- 

 sional engineering societies. I have there- 

 fore concluded to ask your attention for a 

 few minutes to a consideration of the pro- 

 fession of engineering itself and its rela- 

 tion to the American Association for the 

 Advancement of Science. 



I do this, in the first place, because the 

 profession is one in the standing and rec- 

 ognition of which I have the deepest per- 

 sonal interest, and, in the second place, 

 because I have even within a few months 

 been made to realize that many well in- 

 formed people deny that engineering is a 

 profession at all or the engineer a profes- 

 sional man in the proper sense of the term ; 

 and, in the third place, because the relation 

 of the profession to this association seems 

 to have long been a matter of doubt and 



' Address of the vice-president and chairman of 

 Section D — Mechanical Science and Engineering. 

 American Association for the Advancement of 

 Science, Boston, December 29, 1909. 



