29S [Dec, 1845. 



basin composed of igneous rocks, and these partly bare of vege- 

 tation, was referred to, as favoring the continuance of the water 

 which falls upon the slopes, for a considerable time in contact 

 with the air, and subjected to evaporation before it reaches the 

 pond. This was considered adequate to account for the small 

 difference .1839 — .1764= .0064 between the drainage from that 

 district, and the one found at Long Pond. 



^Stated Meeting, Dec. 23, 1845. 

 Vice President Morton in the Chair. 



DONATIONS TO LIBRARY. 



Memoir on the copper region of Gibara, and of the geology 

 of the N. E. part of the Island of Cuba, with a recon- 

 noisance map. By Richard C. Taylor. From the Author. 



Notice of Fossil Arborescent Ferns, of the family of Sigillaria, 

 in the coal formation of Pennsylvania, with an illustrative 

 drawing and map. By Richard C. Taylor. From the 

 Author. 



A communication was read from Mr. Edward Harris, en- 

 titled "Description of a new species of Parus,from the Upper 

 Missouri," and referred to a committee, consisting of Messrs, 

 Cassin, Townsend and Woodhouse. 



A letter was read from Jacob Tremper, Esq., dated Dres- 

 den, Yates Co., New York, returning acknowledgments for 

 his election as a Correspondent. 



Prof. Johnson read the conclusion of his report of an ex- 

 amination and analysis of the alluvial soil of the Nile, from 

 Korosco in Nubia.. 



The report was adopted, and referred for publication to 

 the Committee on Proceedings. 



