xviii MINUTES. [April 25. 



" By scientific expeditions to many different parts of the world he has 

 revealed the secrets of their vegetation. His extraordinary experience em- 

 braces both the nature of tropical India as also the subtropical and temperate 

 climates, as well as of the cold antarctic regions. The contents of his floristic 

 works are therefore exceedingly rich. He has furthermore enriched botany 

 by splendid works in other departments of this science, for instance concern- 

 ing the geographical distribution of plants, their classification and other 

 matters." 



I have the honor of unveiling the medallion of Sir Joseph Dalton 

 Hooker, the energetic explorer, the eminent systematist, the dis- 

 tinguished investigator of the problem of plant evolution. 



The following papers were read : 

 " The Burgess Shale Fauna of the Canadian Rockies," by 

 Charles D. Walcott, Ph.D., Sc.D., LL.D., Secretary of the 

 Smithsonian Institution, Washington. 

 " Summary of Researches, Department of Terrestrial Magnet- 

 ism, 1904-14." (Illustrated.) By Louis A. Bauer, Ph.D., 

 D.Sc, Director of the Department of Terrestrial Alagnetism 

 of the Carnegie Institution, Washington, D. C. Discussed by 

 Prof. Pickering. 

 Symposium on Physics and Chemistry of Protoplasm : 



" The Germ Plasm as a Stereochemic System," by Edward 

 T. Reichert, M.D., Prof. Physiology in Univ. of Penna. 

 (Introduced by Dr. Keen.) 

 "Arrangement and Distribution of Substances in the Cell," 

 by Edwin Grant Conklin, Ph.D., Sc.D., Professor of 

 Zoology at Princeton University. 

 "Vital Staining of Protoplasm," by Herbert McLean Evans, 

 M.D., Associate Professor of Anatomy, Johns Hopkins 

 University. (Introduced by Prof. Piersol.) 

 "The Physical State of Protoplasm," by G. L. Kite, M.D., 

 Ph.D., Phipps Institute, Philadelphia. (Introduced by 

 Prof. McClung.) 

 "The Physico-Chemical Organization of the Cell," by Law- 

 rence J. Henderson, A.B., M.D., Assistant Professor of 

 Biological Chemistry, Harvard University. (Introduced 

 by Dr. H. F. Keller.) 



