Upon the latter point they would have been correct if dependence had been placed upon guesswork or any empirical method of determining the amount needed. It remained to find the true solution of the problem by so regulating the quantity of the coins that it would respond automatically to the demands of trade. The correct method of doing this is through the system of exchange funds. As this system is operated in the Philippines, it is not possible to obtain gold coin for silver certificates in small quantities; but it is possible always to obtain drafts upon New York at par, plus the usual charges for exchange between gold standard countries. These drafts have to be purchased with actual silver coin or coin certificates. In either case the coins and certificates are, by the requirements of the coinage law, held in the Philippine Treasury. The law does not permit their deposit by the Treasury in current account at a bank, which would turn them back into the general circulation. For practical purposes the volume of currency in circulation is contracted to the same extent as if a corresponding amount of gold were taken from the circulation for export. When the current turns and rates for money become high in the Philippines, Philippine currency can be released for local circulation by the purchase in New York from the gold standard fund of bills upon the Philippine Treasury. This rule of locking up the proceeds of the sale of bills is not rigidly applied to the funds in New York, because the influence of the Philippine purchases upon the local circulation there would be insignificant. On the contrary, the Government obtains a generous interest rate, which has at times been as high as 4 per cent., upon the deposit of Philippine funds with New York bankers. During the stress of the autumn of 1907 considerable transfers of capital were made from Manila to New York by means of the purchase of New York drafts from the Philippine Treasury. The process, often repeated even under less serious pressure, clearly shows that the monetary system of the Philippines is linked to gold, and that capital can be freely transferred upon a gold basis between Manila and other markets.