27 



past Century, &c. &c. By Jacob R. Eckfeldt and William E. 



Du Bois, Assayers of the Mint of the United States. Philadel- 

 phia, 1842. 4to. — From the Autho7's. 

 Memoir on the Reconnaissance of Rivers. Translated from the 



French by Lieut. W. R. Palmer, U. S. Corps of Topographical 



Engineers. Philadelphia, 1843. 8vo. 2 copies.— From the 



Translai07\ 

 Vierter Bericht uber das Museum Francisco-Carolinum. Linz, 1840. 



8vo. — From the Rev. Professor Rally, of Baltimore. 

 Funfter Bericht uber das Museum Francisco-Carolinum. Linz, 1841. 



8vo. — From the same. 

 Sechster Bericht uber das Museum Francisco-Carolinum. Linz, 



1842. 8vo. — From the same. 

 Zweyter Bericht liber die Leistungen des Vaterlandischen Bereines 



zur Bildung eines Museums fiir das Erzhervogthum Oesterreich 



ob der Enns und das Herzogthum Salzburg. Linz, 1836. 4to. 



From the same. 

 Der Fiihrer im Salzkammergute und auf der Linz. By W. B. Rally. 



Wien, 1841. 12mo. — From the same. 

 Die Donaureise von Regensburg bis Linz. By W. B. Rally. Wien, 



1840. 12mo. — From the same. 

 Statuten des Bereines : Museum Francisco-Carolinum. Linz, 1841. 



8vo. — From the same. 



ADDITIONS TO THE LIBRARY BY PURCHASE. 



Journal General de la Litterature de France. Douzieme Cahier. 

 Decembre, 1841. 8vo. 



Title and Index to L'Institut. lere Section, Tome X. 2eme Sec- 

 tion, Tome VIL 



Astronomische Nachrichten. Nos. 487, 488. September, 1843. 4to. 



Dr. Bache announced the death of Mr. Ferdinand Rudolph 

 Hassler, a member of the Society, at the age of 73 years, which 

 occurred in this city on the 21sf of November last. 



Mr, Thomas Gilpin read an Essay on the Position of the 

 Organic Remains, as connected with a former tropical region 

 of the earth. 



The general principle advocated in this essay is, that the position 

 of the organic remains gives evidence that in a former zone of equa- 

 torial heat the tropical products encircled the earth uniformly, and of 

 course under different influences from any of the present climates. 



