Again, one of the principal objects for which money was devised and brought into use was to serve as a measure, or standard, for estimating the comparative value of other things. But it seems hardly possible to conceive of a person desirous of using money for such purpose, selecting an article to measure values which in itself possesses no value, or costs no labor to produce, any more than he would select as a standard for measuring length something which had no length, or as a standard for measuring weight something which had no weight. The people of the island must have been unusually stupid if they did not from the outset, therefore, clearly see that nothing can be reliable and good money under all circumstances which does not of itself possess the full amount of the value which it professes on its face to possess. CHAPTER V. HOW THE PEOPLE ON THE ISLAND AND ELSEWHERE LEARNED WISDOM. But while any commodity possessed of acknowledged purchasing power or value may be used as money, the experience of the islanders and every other people must have soon taught them that some commodities are much better adapted to this purpose than others; or, rather, that the use of certain commodities as money, while they may answer the purpose, nevertheless entail very serious disadvantages. And the details of the manner in which this information has been acquired by experience constitute one of the most interesting chapters in the world's history. The experience of the islanders was somewhat as follows: At the outset they agreed to use cowries--a pretty shell picked up on the beach, and which the women all desired to have and use as an ornament. These shells were not, however, plentiful; and, in fact, it was found that it required about as much time and labor for a man to collect a hundred of them as it did to grow a bushel of wheat. Consequently, wheat regularly exchanged for cowries (as money) at the rate of one hundred cowries for one bushel, while the farmer with two thousand cowries could readily buy a plow, which was considered equivalent in value to twenty bushels. By-and-by, some idle fellows that were in the habit of sailing made a long excursion, and, for the first time, visited a little island on the remote horizon. When they landed, they found, to their surprise, that instead of cowries being very scarce on the beach, they were very abundant. They winked at one another, and said little; but each man proceeded to gather all the cowries he could, and, returning to the main island, kept their discovery a profound secret.