400 Remark. 
Committee of Publication--Thomas Say, Isaac Hays, 
M. D., Isaac Lea, R. E. Griffith, M.D., W.H. 
Keating. 
P. S. Some items of Domestic Intelligence are excluded to 
give place to the following notice of a letter to the editor, dated 
Hamburgh, May 20th, 1824, received just as the last form of 
this number was going to the press. 
An Exchange of Objects of Natural History, and of Ingen- 
ious Artificial Curiosities, has recently been opened in Neue- 
burg, No. 43, Hamburgh, by Charles Henry Bescke, a native of 
Philadelphia, By his connexions in the East and West Indies, 
Brazil, the Canary Islands, and various other parts of the 
world, this gentleman has been enabled to make an extensive 
collection of Birds, Amphibious Animals, Insects, Shells, Corals, 
&c. ; also, Minerals, Dried Plants, Seeds, and ingenious Artificial 
Curiosities. He is desirous to form a connexion with some ama- 
teurs and collectors of the United States. He will receive in 
exchange any Natural Products; and will pay money for good 
skins of the quadrupeds and birds of this country, and for well 
preserved insects and butterflies. These articles may be for- 
warded to some house in Hamburgh, to be delivered to him, or 
directly to him. If an exchange be requested, he is willing to 
make up the first package, if the objects of which it is to con- 
sist be specified. He will exchange or sell either collec- 
tions or single specimens, and will endeavor to establish reason- 
_ able prices. He would like to receive in the autumn, a quan~ 
tity of living crysalides of butterflies, which, being enwrapped 
in cotton, generally come safe to hand. For these, he would 
send in return, European ones, or other natural products, as 
might be desired. 
An institution of this kind, it is thought, may be very benefi- 
cial in facilitating the acquisition of specimens of the objects of 
Natural History, and it is hoped that the gentleman may re- 
ceive merited encouragement. 
Remarx.—We have received a printed report of the sur- 
vey for a canal in the State of New-Jersey ; but a notice of 
this, and of various other domestic articles, which were 
intended for this number, is necessarily postponed. 
