SCIENCE 



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



OFFICIAL NOTICES AND PROCEEDINGS OF THE AMERICAN ASSOCIATION 



FOR THE ADVANCEMENT OF SCIENCE. 



EDITOEI.AL CoMMiTTEB : S. Newcomb, Mathematica ; E. S. Woodwakd, Mechanics ; E. C. Piokeeing, 

 Astronomy ; T. C Mendenhall, Physics ; E. H. Thurston, Engineering ; Iea Ebmsen, Chemistry ; 

 Chaeles D. Walcott, Geology ; "W. M. Davis, Physiography ; Henhy F. Osboen, Paleon- 

 tology ; W. K. Beooks, C. Haet Meeeiam, Zoology ; S. H. Scxjddbe, Entomology ; C. E. 

 Bessby, N. L. Beitton, 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, May 30, 1902. 



CONTENTS: 

 Scientific Research: Professor C. L. Doo- 



LITTLE 841 



The Importance of a Laioratory Course of 

 Physics in the Study of Medicine : Dr. C. C. 

 Trowbridge 848 



The Motion of Ions: Bergen Davis 853 



The Tropical Laboratory at Miami, Florida : 

 Professor V. M. Spalding 856 



Henry Morton: Professor R. H. Thurston.. 858 



Scientific Books: — 



Willoughby's Hygiene for Students: Dr. 

 Geo. M. Kober. v. Salisch on Forstds- 

 thetih: G. Frederick Schwarz. Kellogg' s 

 Zoology : Professor G. H. Parker 861 



Scientific Journals and Articles 865 



Societies and Academies: — 



The American Physical Society: Professor 

 Ernest Merritt. The Philosophical Society 

 of Washington: Charles K. Wead. The 

 Section of Geology and Mineralogy of the 

 Nero York Academy of Sciences: Dr. E. 0. 

 Hovey. The Academy of Science of St. 

 Louis: Professor William Trelease. 

 The Pacific Coast Association of Chemistry 

 Teachers : Edward Booth 865 



Discussion and Correspondence: — 



The Coming Meeting of the American Asso- 

 ciation for the Advancement of Science: 

 Dr. W. J. Holland. The American Chem- 

 ical Society: Dr. A. C. Hale and Francis 

 C. Phillips. On Pyrite and Marcasite: 

 Dr. Alexis A. Julien. Coiled Basketry: 

 Professor 0. T. Mason. The Mua Shower: 

 Professor A. E. Verrill. Magnetic Dis- 

 turbance at the time of the Eruption of 

 Mont Pelee: Dr. L. A. Bauee. The Gaut- 

 emala Earthquake Waves: C. A 868 



Shorter Articles: — 



Intracellular Canaliculi of the Liver: Pro- 

 fessor Gilbert L. Houser 874 



The Nichols Research Medal of the American 

 Chemical Society 875 



Meteorology in Argentina 875 



Scientific Notes and News 876 



University and Educational News 879 



SCIENTIFIC RESEARCH* 



In connection with the so-called form of 

 initiation as prescribed by the constitution 

 of this Society we find this precept, 'The 

 president or his deputy shall explain the 

 aims and objects of the society.' 



I understand it to be a common interpre- 

 tation of this provision that a more or less 

 fonnal address is to be presented, either 

 by the president of the chapter, or what 

 in the present ease at least would be better, 

 by some distinguished member of the so- 

 ciety acting as deputy, to retain the phrase- 

 ology of the written law. 



In connection with the exercises of this 

 evening the duty appears to fall upon my 

 shoulders, biit it is not my purpose to 

 make this communication either lengthy or 

 formidable. 



As- to the aims and objects of this so- 

 ciety we find them fully set forth in section 

 2 of the Constitution viz. : 



The object of this Society shall be to encourage 

 original investigation in science, pure and ap- 

 plied; by meeting for the discussion of scientific 

 subjects; by the publication of such scientific 

 matter as may be deemed desirable; by establish- 

 ing fraternal relations among investigators in the 

 scientific centers and by granting the privilege 

 of membership to such students as have, during 

 their college course, given special promise of 

 future achievement. 



* Address delivered at the initiation of new 

 members of the University of Pennsylvania Chap- 

 ter of the Society of Sigma Xi, April 18, 1902. 



