THE PROCEEDINGS 



OF THE 



WASHINGTON ACADEMY OF SCIENCES 



There have been printed since 1898 thirteen volumes 

 of the Proceedings of the Washington Academy of Sciences. 

 The Proceedings consist of original papers, covering a vari- 

 ety of subjects. The volumes contain from 200 to 700 

 pages and a limited number of separates of each paper is 

 also available. A list of the titles with prices will be fur- 

 nished on request by the Treasurer of the Academy, Mr. 

 Alfred H. Brooks, Geological Survey, Washington, D. C. 



