Therefore we may, with a good deal of probability, conclude that we have got a people who had already a knowledge of the art of weighing before they were acquainted with either silver or iron, and that this people used the scales for gold and nothing else. This, taken in connection with the fact that in Homer, although silver is known, the weighing of metals is confined to gold, leads us irresistibly to conclude that gold was the first of all substances to be weighed, or, to put it in a different way, the art of weighing was invented for gold. CHAPTER VI. THE GOLD UNIT EVERYWHERE THE VALUE OF A COW. We have now proved four things: (1) the general distribution of the ox throughout our area, (2) its universal employment as the unit of value throughout the same region, (3) the equable distribution of gold throughout the same countries, and (4) that gold is the first of all commodities to be weighed. Our next step will be to show that gold was weighed universally by the same standard, and that this standard unit in all cases where we can find record was regarded as the equivalent of the ox or the cow. We have already seen that the gold talent of the Homeric Poems, which was in use among the Greeks before the art of stamping money had yet become known, weighed about 130 grains troy (8·4 grammes). In historical times gold was always weighed on what was called the _Euboic_ (or Euboic-Attic) standard. Thus when Thasos began to strike gold coins in 411 B.C. after her revolt from Athens they weighed 135 grs. Unless this had been the time-honoured unit employed for gold in that island so famous for its mines the Thasians would hardly have employed it. Certainly they would not adopt it simply because it was the standard of the hated Athenians, especially as they had a different standard for silver. The gold coins of Athens struck a few years later are on the same standard of 135 grs, and when Rhodes at the beginning of the fourth century B.C. began to coin gold, she used the same unit, although she employed for silver the unit of 240 grs. Cyzicus also, although coining her well-known electrum _Cyzicenes_ on the Phoenician standard, used the unit of 130 grs for pure gold. [Illustration: FIG. 16. GOLD STATER OF PHILIP OF MACEDON.] This standard, as we shall presently see, virtually remained unchanged for gold down to the latest days of Greek independence. It likewise prevailed in Macedonia and Thrace. For when Philip II. coined the gold from the mines of Crenides into staters on the so-called Attic standard of 135 grains, he did nothing else than employ for the first gold coinage of his country the unit which had there, as in Greece Proper, prevailed for many ages for the weighing of gold. For since gold was first coined in that region about 350 B.C., and yet silver coins had been current in Thrace and Macedon since about 500 B.C., it would be absurd to suppose that there was no unit by which gold in ingots or rings could be appraised.