Scientific and General Memoranda. ' 229 



Linneus ; and that, on taking leave of him to embark for America, 

 that illustrious naturalist fell on his neck, and kissing him, bade 

 him not to forget the great cause of Natural History, in that ex- 

 tensive field to which he was bound. He also stated, that he 

 had, at various times, sent to Sweden, nearly all the American 

 forest trees that promised to stand the climate, and that immense 

 numbers of them now flourished there. Dr. Collin, in 1793, pub- 

 lished some opinions on the subject of Yellow Fever, which were 

 opposed to those of the late Dr. Rush. He was proud of his at- 

 tainments as a linguist, and was a man of much worth aTid learn- 

 ing. We do not know what his age was at his decease, but it 

 must have been very advanced, as he had reached manhood be- 

 fore he left Sweden, and had resided here sixty years. He died 

 .in Philadelphia, October 8th, 1831 



SCIENTIFIC AND GENERAL MEMORANDA. 



Auduhm's Expedition to California, the Rocky Mountains, SfC. — 

 We are authorized to state, that information of the progress of 

 Mr. Aududon will be given, from time to time, to the scientific 

 world, in the pages of this Journal. 



We are gratified in being able to state, that he was received 

 in the most cordial manner, at Washington, and that the distin- 

 guished gentlemen in authority there, have given him such let- 

 ters to the military posts on the frontiers, as will assure him the 

 aid and protection his personal safety may require. We antici- 

 pate the most interesting reconnoisances, both geological and 

 zoological, from this enterprising naturalist, who is accompanied 

 by Mr. Lehman, as an assistant draftsman, and by an assistant 

 collector, who came with him from Europe. In a recent letter 

 from Virginia, he says, " The weather is pretty cool, and the 

 land birds all gone south : I intend to push for the Floridas, to 

 overtake the fellows ere they cross the Gulf." — Editcfr. 



Volcano in the Mediterranean.— K letter from the Commander 

 of H. B. M. sloop of war Rapid dated Malta, July 22, con- 

 tains the following:— "On the 18th of July, 1831, at 4 P. M., 

 the town of Marsala bearing, by compass, E. half N. nine miles, 

 I observed from on board his Majesty's sloop Rapid, under my 



