Although an inconvertible paper currency has no intrinsic value, it can (in accordance with the quantity theory of money) be maintained at a fairly stable ratio to gold or commodities by an honest government if the total issue is fixed, or kept between reasonable maximum and minimum limits. The rise of prices since the war, in each country where reliable statistics are available, has been in proportion to the expansion of the paper currency, allowance being made for the scarcity of commodities. Of course a decline in purchasing power _follows_ an expansion of circulation. The stability of the British paper pound since a limit was imposed illustrates the correctness of the quantity theory of money. Its increase in purchasing power (like that of the gold dollar) during the first half of 1921 is, of course, due to the fact that the supply of utilities had overtaken the demand. At first sight it seems difficult to understand how any government, however bad, can _deliberately_ issue flood upon flood of inconvertible paper money, seeing that its printing operations are ruinous to both public and private credit. To obtain the same amount of revenue, each new issue, each new dose, has to be much larger than the preceding. In the course of twelve months, for example, the exchange value of the Polish mark was divided by ten, that is, at the end of the period, ten times as much paper money had to be printed as at the beginning, to get the same revenue. Yet the Polish Government continued upon its course with the approval and support of the Polish Diet. The following quotation is from the Warsaw correspondent of the _London Economist_, who wrote on July 28, 1921: The effects of the last collapse of the exchanges are beginning to make themselves felt, and the Diet is already preparing fresh ground for new currency inflation. By its last vote the limit on the note circulation has been increased to 118 milliards, and on the advances of the Polish National Bank to the Government to 150 milliards.