458 Scientific Intelligence. 



species of Productus have given rise to different forms of Stro- 

 phalosia. If this is all true, our definitions of these subdivisions 

 needs emendation, and the reviewer regrets that he is not able to 

 follow the discussion in the Russian text. c. s. 



7. The Data of Geochemistry ; by Frank Wigglesworth 

 Clarke. Pp. 716. Bull. 330, U. S. G. S.— The critical works 

 of Bischof and Roth are well known to all geologists and contain 

 what is most essential to the discussion of Chemical Geology- 

 down to the time of their publication. Years, however, have 

 passed since the more recent of these appeared, and the material 

 which many workers have added to this department of geology 

 is extensive and varied. Furthermore, recent investigations 

 have attacked many new problems, or approached old ones from 

 new points of view. Important service to science has, therefore, 

 been done by Prof. Clarke in bringing together in this volume 

 a digest of this recent literature belonging to the special depart- 

 ment w T hich is called by the author, Geochemistry. The work, 

 however, is not simply a compilation, although on this side its 

 completeness and the abundant references to the original litera- 

 ture would make it most useful ; it is also a critical summary 

 of the whole subject, containing many suggestions from the 

 author himself. After an introductory chapter devoted to the 

 relations of the chemical elements and their distribution, the prin- 

 cipal topics treated of are : the atmosphere ; the water of lakes, 

 rivers, and oceans, with the saline residues which have accumu- 

 lated in certain regions ; volcanic gases and the molten magma ; 

 rock-forming minerals ; igneous and metamorphic rocks, and 

 metallic ores. 



III. Miscellaneous Scientific Intelligence. 



1. National Academy of Sciences. — The annual spring meet- 

 ing of the National Academy was held in Washington on April 

 21-23 ; upwards of forty members were in attendance. The 

 following are the officers : President, Ira Remsen ; Vice Presi- 

 dent, Chas. D. Walcott ; Home Secretary, Arnold Hague ; 

 Treasurer, S. F. Emmons. 



The following new members were elected: Edwin Brant Frost, 

 Yerkes Observatory; William E. Story, Clark University; Ernest 

 F. Nichols, Columbia University; William F. Hillebrand, U. S. 

 Geological Survey; William B. Clark, Johns Hopkins University; 

 Whitman Cross, U. S. Geological Survey; Edwin Grant Conklin, 

 Princeton University; Theobald Smith, Harvard Medical School; 

 Simon Flexner, Rockefeller Institute for Medical Research. 



The following foreign associates were also elected : S. A. 

 Arrhenius, Stockholm; Charles Barrois, Lille; Joseph Larmor, 

 Cambridge; Ivan Petrovic Pavlov, St. Petersburg; Hugo Ritter 

 von Seeliger, Munich. 



The next meeting of the Academy will be held on November 

 17 next at Johns Hopkins University, in Baltimore, Md. 



