via MINUTES. [April 21. 



"Some Peculiarities in the Motions of the Stars," by W. W. 

 CampbeU, Director of Lick Observatory, Mt. Hamilton, Cal. ; 

 discussed l)y Dr. See, Prof. Pickering and Dr. C. G. Abbot. 



Afternoon Session — 2 o'clock. 



William W. Keen, M.D., LL.D., President, in the Chair. 



" Shore and Off-Shore Deposits of Silurian Age in Pennsyl- 

 vania," by (iilbert \'an Ingen Assistant Professor of Geol- 

 ogy, Princeton P'niversity (introduced by Prof. W. B. Scott) ; 

 discussed by Prof. W. M. Davis. 



" Tertiary Formations of Xorthwestern Wyoming," by William 

 J. Sinclair, Instructor in Geology, Princeton L'niversity. (In- 

 troduced by Prof. William B. Scott. ) 



" On a New Phytosaur from the Triassic of Pennsylvania," by 

 William 15. Scott, Professor of Geology and Palaeontology, 

 Princeton P^niversity. 



"Alimentation of Existing Continental Glaciers," by William 

 H. Hobbs, Professor of Geology, University of ^Michigan, 

 Ann Arbor. 



"On the Formation of Coal Beds," by J. J. Stevenson, Emeritus 

 Professor of Geology, l^niversity of the City of New York. 



" Problems in Petrology," by Joseph P. Iddings, U. S. Geo- 

 logical Survey, Washington. (Introduced by Dr. Keen.) 



"Front Range of the Rocky Mountains in Colorado," by Wil- 

 liam Morris Davis, Professor of Geology, Harvard Univer- 

 sity, Cambridge. 



" Sujiposed Recent Subsidence of the Atlantic Coast," by 

 ])ouglas W. Johnson, Assistant Professor of Physiography, 

 Harvard I'niversity ( intrtxluced by Prof. Wm. Morris 

 Davis); discussed by Dr. See, Mr. \\'illcox and Prof. H. 

 F. Reid. 



"Relation of Isostasy to the Elevation of Mountains," by 

 Harrv h'iclding Reid. I^rofessor of Geological Physics, Johns 

 Hopkins University; discussed by Prof. Iddings, Prof. W. M. 

 Davis, Dr. See and Prof. Reid. 



"The Transi)iralion of Air Througli a Partition of Water." 



