10 



Contributions to Geology, by Isaac Lea. — From the Author. 

 Pamphlets on Scientific subjects, by Walter R. Johnson, Phil- 

 adelphia. — From the Author. 

 Discourses on Scientific subjects, by R. Dunglison, M. D., One 



of the Secretaries of the American Philosophical Society, 



Philadelphia. — From the Author. 

 Act of Incorporation, By-Laws, and Catalogue of the Library 



of the Academy of Natural Sciences, Philadelphia. — From, 



the Jicademy. 

 Work on the Fossil Shells of the Tertiary Formations of North 



America, illustrated by.tigures drawn on stone from Nature. 



By T. A. Conrad. Vol. I.— From the Author. 

 Copper, Zinc, and Lead ores, Barytes, &c., from the Perki- 



omen Mines, near Philadelphia; and Chromate of Iron from 



the Islandof Cuba. — From Richard C. Taylor, Philadelphia. 

 JefFersonite, in large crystals. Garnet, a very large crystal. 



Automalite, from Franklin, New Jersey. — From Isaiah 



Lukens, Philadelphia. 

 Collection of Geological specimens, Minerals, Ores, Fossils, In- 

 dian relics, &c. with a descriptive catalogue. — From Francis 



Markoe,Jr. 

 Fauna Columbiana, by T. B. J. Frye, M. D. in MS. — From 



the author. 

 48 Specimens of American wood. — From John Lenthall, 



Naval Constructor, Philadelphia. 



A letter was read from Alexander Maclure of New Har- 

 mony, Indiana, offering asuite of Geological specimens, Minerals, 

 &c. from the Cabinet of his deceased brother, William Mac- 

 lure, late President of the Academy of Natural Sciences of 

 Philadelphia ; also, the following letter from the venerable Mr. 

 Du Ponceau, President of the American Philosophical Society, 

 and an honorary member of the National Institution. 



PaiLADCLPHiA, November, 1840. 

 To Frasch Mabkos, jr. 



Corretponding Secretary of the National Irutitution. 



.Ml Dear Sin : I have read with great attention and pleasure the constitution 



and by-laws of the National Institution, which you have had the goodness to com- 



