A nation may purchase the pay and provisions of an army in a distant country three different ways; by sending abroad either, first, some part of its accumulated gold and silver; or secondly, some part of the annual produce of its manufactures; or last of all, some part of its annual rude produce.
The gold and silver which can properly be considered as accumulated or stored up in any country, may be distinguished into three parts; first, the circulating money; secondly, the plate of private families; and last of all, the money which may have been collected by many years parsimony, and laid up in the treasury of the prince.
It can seldom happen that much can be spared from the circulating money of the country; because in that there can seldom be much redundancy. The value of goods annually bought and sold in any country requires a certain quantity of money to circulate and distribute them to their proper consumers, and can give employment to no more. The channel of circulation necessarily draws to itself a sum sufficient to fill it, and never admits any more. Something, however, is generally withdrawn from this channel in the case of foreign war. By the great number of people who are maintained abroad, fewer are maintained at home. Fewer goods are circulated there, and less money becomes necessary to circulate them. An extraordinary quantity of paper money, of some sort or other too, such as exchequer notes, navy bills, and bank bills in England, is generally issued upon such occasions, and by supplying the place of circulating gold and silver, gives an opportunity of sending a greater quantity of it abroad. All this, however, could afford but a poor resource for maintaining a foreign war, of great expense and several years duration.