PHILOSOPHICAL SOCIETY OS WASHINGTON. 63 



31sT Meeting % October 5, 1872, 



The President in the Chair. 



Mr. E. B. Elliott read a letter froia Dr. Curtis, giving an 

 account of Prof. Hayden's progress in the survey of the Western 

 Territories. 



Mr. S. Newcomb made a second communication 

 ON the progress of the construction of the new telescope 



FOR THE NAVAL OBSERVATORY, 



{The substance of these remarks is puhlixlied in Scribner''s Monthly Magazine, 

 October, 1873.) 



General W. T, Sherman, by invitation of the Chair, gave an 

 account of his recent visit to Egypt. 



32d Meeting. October 19, 1872. 



The President in the Chair. 

 Mr. Joseph Henry made a communication 



ON THE fluctuations OP THE RIVER NILE. 



Mr. J. H. C. Coffin exhibited, with some comments, 



maps prepared by g. w. hill for use in connection with the 

 transit of venus in december, 1874- 



{These maps are published with text as Part II, of Papers relating to the 

 Transit of Venus.) 



Mr. Charles S. Peirce made a communication 

 on stellar photometry. 



(This paper ioill be published in the Annals of the Harvard College Observa- 

 tory.) 



Mr. E. B. Elliott communicated some details of an investi- 

 gation made by him 



ON the adjustment of census returns. 



