§ 2. #Qualities of the original money-good#. The selection of any money-commodity has not been mere chance, but has been the result of that object being better fitted than others to serve as a medium of exchange. The main qualities that affected the selection of primitive form of money were as follows: 1. Marketability (or saleability); that is, it must be easy to sell. The first forms of money had to be things which every one desired at some time and many people desired at any time. That was the essential quality that made any one ready to take it even when he did not wish to use it himself. Many kinds of food and of clothing are very generally desired goods. But few of these classes of goods have in a high measure certain other important qualities, now to be named. 2. Transportability; that is, the money material must be easy to carry, it must have a large value in small bulk and weight. To carry a bag of wheat on one's back a few miles requires as great an effort ordinarily as does the raising of the wheat, and the cost of carriage for fifty miles even by wagon will often equal the whole value of the wheat. Cattle, while not comparatively very valuable in proportion to weight, and not possessing the other qualities of money in the highest degree, have the advantage that they can be made to carry themselves long distances, and therefore they have been much used as money in simpler economic conditions. 3. Cognizability; that is, the money-good must be easy to know, and to judge as to quality. If expert knowledge or special apparatus are needed to test it in order to avoid counterfeits, few could be ready to take it and trading would be a costly process. 4. Durability; that is, the money-good must be easy to keep without much loss in amount or in quality, perhaps for long periods, until it can be passed on in trade. Few kinds of food answer very well to this last requirement, being organic and perishable. But all four qualities above named were pretty well embodied in primitive times in rock salt, in rare flints and bits of copper suitable for tools and weapons, in furs in northern countries, and in many articles of personal adornment, such as beads, feathers, jewels, and metal ornaments.