So much for the theses to be maintained. The detailed proof of these contentions will best be given in connection with a critical account of various versions of quantity theory doctrine. Attention will be given in this summary to the expositions of Nicholson, Mill, Taussig, and Kemmerer, and very special attention to I. Fisher, though some other writers will also be taken into account. CHAPTER VII DODO-BONES Must money have value from some source outside its money-functions? It is a part of the quantity theory that this is unnecessary. I have cited, in the preceding chapter, Irving Fisher and J. S. Nicholson to this effect. Nicholson's statement is interesting and picturesque, exhibiting the quantity theory in all the nakedness of its poverty, and I shall present it at some length. "For simplicity," to isolate his phenomenon, he assumes a hypothetical market, in which the following conditions obtain: (1) No exchanges are to be made unless money (which he assumes to consist of counters of a certain size made of dodo-bones) actually passes from hand to hand. No credit or barter. (2) The money is to be regarded as of no use whatever except to effect exchanges, so that it will not be withheld for hoarding, _i. e._, will be actually in circulation. (3) There are ten traders in the market, each with one kind of commodity and no money, and one trader with all the money (one hundred pieces), and no commodities. Further, let this moneyed man put an equal estimation on all the commodities. Now let the market be opened according to the rules laid down; then all the money will be offered against all the goods, and, every article being assumed of equal value, the price given for each article will be ten pieces, and the general level of prices will be ten. It is perfectly clear that, under these suppositions, if the amount of money had been one thousand pieces, the price-level would have been one hundred per article, etc. Under these very rigid assumptions, then, it is obvious that the value of money varies exactly and inversely with the amount put into circulation.--The rapidity of circulation he regards as cooerdinate, in fixing the price-level, with the volume of money. To illustrate this, he assumes again his hypothetical market, and "dodo-bones," assuming as before that one merchant has all the money (one hundred pieces), and that ten have commodities of equal value. Instead, however, of the merchant with the money desiring all the commodities equally, he is made to desire only the whole of that of trader one, who in turn desires the whole of number two's stock; and so on to the ninth merchant, who wants the commodity of number ten, _who wants the dodo-bones_. In this case, each article will be exchanged only once, as formerly, but the money will change hands ten times, and the price of each article will be one hundred instead of ten. "We now see that, under these circumstances, with the same quantity of