of a skeleton triple rows of beads, made of marine shells and the tusks of some animal. "Several of these," says Squier, "still retain their polish, and bear marks which seem to indicate that they were turned in some machine, instead of being carved or rubbed into shape by hand."
"Not among the least interesting and remarkable relics," continues the same author, "obtained from the mounds are the stone tubes. They are all carved from fine-grained materials, capable of receiving a polish, and being made ornamental as well as useful. The finest specimen yet discovered, and which can scarcely be surpassed in the delicacy of its workmanship, was found in a mound in the immediate vicinity of Chillicothe. It is composed of a compact variety of slate. This stone cuts with great clearness, and receives a fine though not glaring polish. The tube under notice is thirteen inches long by one and one-tenth in diameter; one end swells slightly, and the other terminates in a broad, flattened, triangular mouth-piece of fine proportions, which is carved with mathematical precision. It is drilled throughout; the bore is seven-tenths of an inch in diameter at the cylindrical end of the tube, and retains that calibre until it reaches the point where the cylinder subsides into the mouth-piece, when it contracts gradually to one-tenth of an inch. The inner surface of the tube is perfectly smooth till within a short distance of the point of contraction. For the remaining distance the circular striæ, formed by the drill in boring, are distinctly marked. The carving upon it is very fine."
That they possessed saws is proved by the fact that on some fossil teeth found in one of the mounds the strice of the teeth of the saw could be distinctly perceived.
When we consider that some of their porphyry carvings will turn the edge of the best-tempered knife, we are forced to conclude that they possessed that singular process, known to the Mexicans and Peruvians, of tempering copper to the hardness of steel.
