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.fmea1con Stone.--.a ne,rlg discopeyed ccment.--Longinus never made truer re- mark than when he said q democracy was the cradle of science" The unfettered mind, expanding to its utmost power of ex- tension, under free laws and institutions. deveiopes powers that lie dormant and re- pressed beneath the chains of monarchy and despotism. Discoveries and lnyen- tions are created m the combinations of thought, which seem almost magical and supernatural compared with the results of intellectual operations in governments of force. Our own country has demonstrated the truth of these remarks in her Franklin. her Fulton, Whitney, and many others, and in the astonishing rapidty with which she has applied and improved upon almost every useful art.

 We come now to record another remark able invention, which has before been slightly alluded to, but of which we can now, from our own personal observations of the specimens, and from further infor. nation obained from the inventor, speak in more positive terms. MT. Obadiah Park CT, native of New-H Hampshire, and for many years past a respectable resident in Onondago county, Ill our State, and now in this city, has, after numerous experiments. discovered composition -stucco or ce. ment-which, from state ofliouid mortar. hardens in a few days--say eight CT te;i-- into a solid substance or stone, as impen- 1 eirabie almost as granite, and susceptible of beautiful polish. It is, apparently, chiefly of caleareous nature, or like the hardest kind of marble. Any color may be given to 1t and if not only defies, but actually acquires greater density asid soli- dlty, and less brit,leness under the changes of the atmosphere. He has cbtained a series of patents and at CatskiIl, recently built, as specimen, the wall of small edifice eight feet high, which in eight days

 recalling to mind the fable of Medusa-~ was perfectly petrified with it's door, win- dows, &c., all of which is testified to by the owner to us personally, and by the certificate of the judges of the county and the principal citizens of the place. I. is impossible to foresee the consequences of such discovery. It surpasses, without doubt, all other coments; and the material IS so cheap, that entire houses, of any shape or dimensions. Notifications, canals, aquedncts, &c. may thus be built up in 8 few days, which would utterly supercede brick and stone, and effect complete revolution in architecture. What will not art yet initiate and accomplish?

 ". Y. Foe. Star,