10. But before we pass to these several features of the Indian system, it will be worth while to emphasise two respects in which this system is _not_ peculiar. In the first place a system, in which the rupee is maintained at 1s. 4d. by regulation, does not affect the level of prices differently from the way in which it would be affected by a system in which the rupee was a gold coin worth 1s. 4d., except in a very indirect and unimportant way to be explained in a moment. So long as the rupee is worth 1s. 4d. in gold, no merchant or manufacturer considers of what material it is made when he fixes the price of his product. The _indirect_ effect on prices, due to the rupee’s being silver, is similar to the effect of the use of any medium of exchange, such as cheques or notes, which economises the use of gold. If the use of gold is economised in any country, gold throughout the world is less valuable—gold prices, that is to say, are higher. But as this effect is shared by the whole world, the effect on prices in any country of economies in the use of gold made by that country is likely to be relatively slight. In short, a policy which led to a greater use of gold in India would tend, by increasing the demand for gold in the world’s markets, somewhat to lower the level of world prices as measured in gold; but it would not cause any alteration worth considering in the _relative_ rates of exchange of Indian and non–Indian commodities. In the second place, although it is true that the maintenance of the rupee at or near 1s. 4d. is due to regulation, it is not true, when once 1s. 4d. rather than some other gold value has been determined, that the volume of currency in circulation depends in the least upon the policy of the Government or the caprice of an official.[4] This part of the system is as perfectly automatic as in any other country. The Government has put itself under an obligation to supply rupees whenever sovereigns are tendered, and it often permits or encourages the tender of sovereigns in London as well as in India; but it has no power or opportunity of forcing rupees into circulation otherwise. In two matters only does the Government use a discretionary power. First, in order that it may always be possible to fulfil this obligation, it is necessary to keep a certain reserve of coined rupees, just as some authority in this country—in point of fact the Bank of England—must keep some reserve of token silver and coined sovereigns and not hold in its vaults too large a proportion of uncoined or foreign gold. The magnitude of this reserve is within the discretion of the Indian Government. To a certain extent they must anticipate probable demands on the output of the Mint. But if they miscalculate and mint more than they need, the new rupees must lie in the Government’s own chests until they are wanted, and the date at which they emerge into circulation it is beyond the power of the Government to determine. In the second