In America, just as in Europe, a great number of specimens of pre-historic pottery have been collected. They are, it must be confessed, superior to most of those found in the ancient world. The material of which they were made is very fine, excepting in the case of the vessels of every-day use, in which the clay is mixed with quartz reduced to powder; the shapes of the vessels are of the purest character, and the utmost care has been devoted to the workmanship. They do not appear to have been constructed by the aid of the potter's wheel; but Messrs. Squier and Davis, very competent American archæologists, are of opinion that the Indians, in doing this kind of work, made use of a stick held in the middle. The workman turned this stick round and round inside the mass of clay, which an assistant kept on adding to all round the circumference. In regard to pottery, the most interesting specimens are the pipes, which we should, indeed, expect to meet with in the native country of the tobacco plant and the classic calumet. Many of these pipes are carved in the shape of animals, which are very faithfully represented. These figures are very various in character, including quadrupeds and birds of all kinds. Indeed, in the state of Ohio seven pipes were found on each of which the manatee was so plainly depicted that it is impossible to mistake the sculptor's intention. This discovery is a curious one, from the fact that at the present day the manatee is not met with except in localities 300 or 400 leagues distant, as in Florida. The pre-historic ornaments and trinkets found in North America consist of bracelets, necklaces, earrings, &c. The bracelets are copper rings bent by hammering, so that the two ends meet. The necklaces are composed of shell beads (of which considerable quantities have been collected) shells, animals' teeth, and small flakes of mica, all perforated by a hole so as to be strung on a thread. The earrings also are made of the same material. All these objects--weapons, implements, pottery, and ornaments--have been derived from certain gigantic works which exhibit some similarity, and occasionally even a striking resemblance, to the great earthwork constructions of the Old World. American archæologists have arranged these works in various classes according to the probable purpose for which they were intended; we shall now dwell for a short time on these divisions.