The polished stone hatchets of the two hemispheres are substantially the same. There are differences of material, of course, for in each country the workman was obliged to use such material as was obtainable. There are differences in form between the polished stone hatchets of the two hemispheres, but so there are differences between different localities in the same hemisphere. Some hatchets are long, others short, some round, others flat, some have a pointed end, others a square or nearly square or unfinished end; some are large, others small. But all these differences are to be found equally well pronounced within each hemisphere. [Illustration: Fig. 373. WOMAN'S WOOLEN DRESS FOUND IN AN OAK COFFIN AT BORUM-ESHOI, DENMARK. Bronze Age. Report of the Smithsonian Institution (U. S. National Museum), 1892, pl. CI, fig 2.] [Illustration: Fig. 374. DETAIL OF DRESS SHOWN IN THE PRECEDING FIGURE.] Scrapers have also been found in both hemispheres and in all ages. There are the same differences in material, form, and appearance as in the polished stone hatchet. There is one difference to be mentioned of this utensil--_i. e._, in America the scraper has been sometimes made with a stem and with notches near the base, after the manner of arrow- and spear-heads, evidently intended to aid, as in the arrow- and spear-head, in fastening the tool in its handle. This peculiarity is not found in Europe, or, if found, is extremely rare. It is considered that this may have been caused by the use of a broken arrow- or spear-head, which seems not to have been done in Europe. But this is still only a difference in detail, a difference slight and insignificant, one which occurs seldom and apparently growing out of peculiar and fortuitous conditions. The art of drilling in stone was known over an extended area in prehistoric times, and we find innumerable examples which must have been performed in both hemispheres substantially in the same manner and with the same machine. The art of sawing stone was alike practiced during prehistoric times in the two hemispheres. Many specimens have been found in the prehistoric deposits of both. The aboriginal art of making pottery was also carried on in the same or a similar manner in both hemispheres. The examples of this art are as numerous as the leaves on the trees. There were differences in the manipulation and treatment, but the principal fact remains that the art was the same in both countries. Not only were the products greatly similar, but the same style of geometric decoration by incised lines is common to both. Greater progress in making pottery was made in the Western than in the Eastern Hemisphere during prehistoric times.