PROCEEDINGS OF THE ACADEMY AND 

 AFFILIATED SOCIETIES 



THE GEOLOGICAL SOCIETY OF WASHINGTON 



At the 239th meeting, at the Cosmos Club, February 8, 1911, Prof. 

 Frank Leverett upon invitation presented an informal communication 

 on the investigations of glacial geology that have been carried on in 

 Minnesota during the past year. 



Some exceptional conditions of petroleum accumulation. C. W. Hayes. 

 No abstract. 



The scheelite deposits at Atolia, California. F. L. Hess. No abstract. 



Some features of graphite in the United States. Edson S. Bastin. 



This paper was devoted largely to a description of certain graphite 

 deposits of the Adirondack Region in New York. Geological and chem- 

 ical evidence was advanced to show that some of them were formed by 

 the dynamic metamorphism of carbonaceous sediments and that others, 

 notably the deposit at Lead Hill near Ticonderoga, were formed by 

 dynamic metamorphism succeeded by igneous metamo;phism. Evi- 

 dence was given that the graphite at Lead Hill crystallized at tempera- 

 tures below 575° C. Most of the material of this paper is published in 

 Economic Geology, Vol. V, pp. 134-157, 1910. 



The 240th meeting, held in the Cosmos Club, February 22, 1911, was 

 devoted to a discussion on the subject, Geographical descriptions in 

 geological publications. 



The program opened with an address by Prof. William Morris Davis, 

 who contended for the adoption of a systematic method of geographical 

 description such as would speak in terms of physiographic history. 

 This address was followed by a discussion, in which the following mem- 

 bers took part: M. R. Campbell, A. H. Brooks, Sydney Paige, Whitman 

 Cross, Miss Jennie T. Martin, H. M. Eakin, David White, H. E. Gre- 

 gory, G. O. Smith and W. M. Davis. Robert Anderson, Secretary. 



At the 241st meeting, held in the Cosmos Club, March 8, 1911, Mr- 

 L. D. Burling described a method by means of which very clear results 

 can be obtained in photographing fossils and other opaque objects by 

 reflected light, and photographs were exhibited. Dr. C. D. Walcott 

 exhibited and described lantern slides of panoramic views obtained in 

 the Glacier National Park and in adjacent portions of Canada. 



General description of the Glacier National Park, Montana. M. R. 

 Campbell. 



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