The money of any particular country is, at any particular time and place, more or less an accurate measure or value, according as the current coin is more or less exactly agreeable to its standard, or contains more or less exactly the precise quantity of pure gold or silver which it ought to contain. If in England, for example, forty-four guineas and a half contained exactly a pound weight of standard gold, or eleven ounces of fine gold, and one ounce of alloy, the gold coin of England would be as accurate a measure of the actual goods at any particular time and place as the nature of the thing would admit. But if, by rubbing and wearing, forty-four guineas and a half generally contain less than a pound weight of standard gold, the diminution, however, being greater in some pieces than in others, the measure of value comes to be liable to the same sort of uncertainty to which all other weights and measures are commonly exposed. As it rarely happens that these are exactly agreeable to their standard, the merchant adjusts the price of his goods as well as he can, not to what those weights and measures ought to be, but to what, upon an average, he finds, by experience, they actually are. In consequence of a like disorder in the coin, the price of goods comes, in the same manner, to be adjusted, not to the quantity of pure gold or silver which the coin ought to contain, but to that which, upon an average, it is found, by experience, it actually does contain. By the money price of goods, it is to be observed, I understand always the quantity of pure gold or silver for which they are sold, without any regard to the denomination of the coin. Six shillings and eight pence, for example, in the time of Edward I., I consider as the same money price with a pound sterling in the present times, because it contained, as nearly as we can judge, the same quantity of pure silver. CHAP. VI. OF THE COMPONENT PART OF THE PRICE OF COMMODITIES. In that early and rude state of society which precedes both the accumulation of stock and the appropriation of land, the proportion between the quantities of labour necessary for acquiring different objects, seems to be the only circumstance which can afford any rule for exchanging them for one another. If among a nation of hunters, for example, it usually costs twice the labour to kill a beaver which it does to kill a deer, one beaver should naturally exchange for or be worth two deer. It is natural that what is usually the produce of two days or two hours labour, should be worth double of what is usually the produce of one day's or one hour's labour. If the one species of labour should be more severe than the other, some allowance will naturally be made for this superior hardship; and the produce of one hour's labour in the one way may frequently exchange for that of two hour's labour in the other.