As objects of scientific interest, the managers intend, as early as possible, to commence the formation of a cabinet of petrifactions. The rocks of few other countries contain a greater number and variety of these animal remains of the ancient ocean, than the limestone districts of the Ohio and Mississippi. They both astonish and confound most of the travellers through this region; and although objects of familiar examination to ourselves, they have not been collected or described by our citizens. An extensive and well arranged cabinet of these extraneous fossils would afford, both to the zoologist and geologist, an exquisite feast. It is hoped that every specimen sent to the Society will be accompanied by a label, stating the place where it was found. It is the wish of the Society to obtain and preserve specimens of all the native animals of this country. Most of the larger quadrupeds having receded before the unceasing extension of our settlements, are now so rare as to be unknown to all but our oldest emigrants. Measures will be taken by the managers to procure from the general retreat in the northwest, and exhibit to the people in the Ohio countries, a specimen of every quadruped which lately inhabited them; and while engaged in this enterprise, they hope to import from the same distant wilderness, a variety of the animals which are peculiar to it. Our native birds have not retreated, like our quadrupeds, and are, therefore, within our reach. The managers hope to see the Society, in due time, in possession of a large collection of these beautiful animals. In the accomplishment of this undertaking, it is easy to perceive that the Society may be powerfully aided by the community: and a sanguine hope is entertained, that no backwardness or indifference will be manifested by those who may fortunately have it in their power to forward specimens. In collecting the fishes and reptiles of the Ohio, the Mississippi, and the Lakes, the managers will likewise need all the aid which their fellow-citizens may feel disposed to give them. Although not a very interesting department of zoology, no object of the Society offers so great a prospect of novelty as that which embraces these animals. The managers, therefore, flatter themselves that they will not be suffered to proceed unaided in this portion of their labours. The obscure and neglected race of insects will not be overlooked, and any specimens sufficiently perfect to be introduced into a cabinet of entomology, will be thankfully received.