With the use of copper the Neolithic fades to its end and the Bronze Age commences soon thereafter. This next step in advance was made apparently before 3000 B. C. when some unknown genius discovered that an amalgam of nine parts of copper to one part of tin would produce the metal we now call bronze, which has a texture and hardness suitable for weapons and tools. The discovery revolutionized the world. The new knowledge was a long time spreading and weapons of this material were of fabulous value, especially in countries where there were no native mines and where spears and swords could only be obtained through trade or conquest. The esteem in which these bronze weapons, and still more the later weapons of iron, were held, is indicated by the innumerable legends and myths concerning magic swords and armor, the possession of which made the owner well-nigh invulnerable and invincible. The necessity of obtaining tin for this amalgam led to the early voyages of the Phœnicians, who from the cities of Tyre and Sidon and their daughter Carthage traversed the entire length of the Mediterranean, founded colonies in Spain to work the Spanish tin mines, passed the Pillars of Hercules and finally voyaged through the stormy Atlantic to the Cassiterides, the Tin Isles of Ultima Thule. There, on the coasts of Cornwall, they traded with the native British of kindred Mediterranean race for the precious tin. These dangerous and costly voyages become explicable only if the value of this metal for the composition of bronze be taken into consideration. After these bronze weapons were elaborated in Egypt the knowledge of their manufacture and use was extended through conquest into Palestine, and northward into Asia Minor. The effect of the possession of these new weapons on the Alpine populations of western Asia was magical and resulted in an intensive and final expansion of round skulls into Europe. This invasion came through Asia Minor, the Balkans and the valley of the Danube, poured into Italy from the north, introduced bronze among the earlier Alpine lake dwellers of Switzerland and among the Mediterraneans of the Terramara stations of the valley of the Po and at a later date reached as far west as Britain and as far north as Holland and Norway, where its traces are still to be found among the living population. The simultaneous appearance of bronze about 3000 or 2800 B. C. in the south as well as in the north of Italy may possibly be attributed to a lateral wave of this same invasion which, passing through Egypt, where it left behind the so-called Gizeh round skulls, reached Tunis and Sicily. In southern Italy bronze may have been introduced from Crete. With the first knowledge of metals begins the Eneolithic Period of the Italians. The close resemblance in design and technique among the implements of the Bronze Age in widely separated localities is so great that we can infer a relatively simultaneous introduction.