82 PROCEEDINGS OF THE WASHINGTON MEETING 



Rectob Duval Mesler, U. S. Geological Survey. Washington, D. C. 

 James E. Narraway, Department of Justice, Ottawa, Canada. 

 Herrick East Wilson, University of Chicago, Chicago, Illinois. 

 WiLT.TAM James W^ilson, Geological Survey of Canada, Ottawa, Canada. 



TITLES OF PAPERS ON GENERAL PALEONTOLOGY AND STRATIGRAPHY 



After various announcements by the chair of arrangements for the 

 meetings of the Society and other matters, the reading of the scientific 

 papers, beginning with "General Paleontology and Stratigraphy/' was 

 taken up. 



PHYSICAL CONDITIONS UNDER WHICH ORGANIC AND CHEMICALLY 

 PRECIPITATED LIMESTONES ARE FORMED 



BY T. WAYLAND VAUGHAN 



Eead by the author from manuscript; 15 minutes. 



COASTAL PLAIN INVESTIGATIONS CONDUCTED BY THE UNITED STATES AND 



STATE GEOLOGICAL SURVEYS 



BY T. WAYLAND VAUGHAN 



Presented without manuscript; illustrated with lantern slides and 

 maps; 20 minutes. This paper included a statement by L. W. Stephen- 

 son, read from manuscript by the writer. 



STATE OF OUR KNOWLEDGE OF THE MIDDLE AMERlvAN TERTIARY 



BY WM. H. DALL 



Presented from manuscript; 20 minutes. 



REMARKS ON THE GEOLOGIC SECTION OF THE ISTHMUS OF PANAMA 



BY D. F, MAC DONALD* 



Presented without manuscript; illustrated with drawings; 20 minutes. 

 Discussed by T. Wa3dand Vaughan and Ernst Howe. 



At 12.30 p. m. the Society adjourned for luncheon, convening again at 

 2 p. m^, with Vice-President Stuart Weller in the chair, when the papers 

 on "General Paleontology and Stratigraphy" were continued, preceded 

 by a memorial on Prof. Samuel Calvin. 



MEMORIAL ADDRESS 



Professor Weller spoke of the Society's loss by death during the year 

 of Professor Calvin and reviewed his work in science, and especially his 



* Introduced by T. Wayland Vaughan. 



