what had been requifite for supplying the narrow C HA P. A market which, from re and confined one. Though the fuccefs of a particular day's fishing may be a very uncertain matter, yet, the local fituation of the country being fuppofed, the general efficacy of industry in bringing a certain quantity of fish to market, taking the courfe of a year, or of feveral years together, it may perhaps be thought, is certain enough; and it, no doubt, is fo. As it depends more, however, upon the local fituation of the country, than upon the state of its wealth and industry; as upon this account it may in different countries be the fame in very different periods of improvement, and very different in the fame period; its connection with the state of improvement is uncertain, and it is of this fort of uncertainty that I am here fpeaking. In increasing the quantity of the different minerals and metals which are drawn from the bowels of the earth, that of the more precious XI. I. BOOK ones particularly, the efficacy of human industry feems not to be limited, but to be altogether uncertain. The quantity of the precious metals which is to be found in any country is not limited by any thing in its local fituation, fuch as the fertility or barrennefs of its own mines. Thofe metals frequently abound in countries which poffefs no mines. Their quantity in every particular coun try feems to depend upon two different circumftances; firft, upon its power of purchafing, upon the state of its industry, upon the annual produce of its land and labour, in confequence of which it can afford to employ a greater or a fmaller quan. tity of labour and subsistence in bringing or pur. chafing fuch fuperfluities as gold and filver, either from its own mines or from thofe of other coun tries; and, fecondly, upon the fertility or bar rennefs of the mines which may happen at any particular time to fupply the commercial world with thofe metals. The quantity of thofe metals in the countries moft remote from the mines, must be more or lefs affected by this fertility or barrennefs, on account of the eafy and cheap transportation of thofe metals, of their small bulk and great value. Their quantity in China and Indoftan must have been more or lefs affected by the abundance of the mines of America. So far as their quantity in any particular coun try depends upon the former of thofe two circumstances (the power of purchasing), their real price, like that of all other luxuries and fuperfluities, is likely to rife with the wealth and improvement XI. provement of the country, and to fall with its CHA P. poverty and depreffion. Countries which have a great quantity of labour and fubfiftence to spare, can afford to purchase any particular quantity of thofe metals at the expence of a greater quantity of labour and fubfiftence, than countries which have less to spare. So far as their quantity in any particular country depends upon the latter of thofe two circumftances (the fertility or barrennefs of the mines which happen to supply the commercial world), their real price, the real quantity of labour and fubfiftence which they will purchase or exchange for, will, no doubt, fink more or lefs in proportion to the fertility, and rise in proportion to the barrenness, of those mines. The fertility or barrennefs of the mines, however, which may happen at any particular time to fupply the commercial world, is a circumstance which, it is evident, may have no fort of connection with the state of industry in a particular country. It feems even to have no very neceffary connection with that of the world in general. As arts and commerce, indeed, gradually spread themselves over a greater and a greater part of the earth, the fearch for new mines, being extended over a wider furface, may have fomewhat a better chance for being fuccefsful, than when confined within narrower bounds. The discovery of new mines, however, as the old ones come to be gradually exhausted, is a matter of the greatest uncertainty, and fuch as no human skill or industry can enfure. All L. BOOK indications, it is acknowledged, are doubtful, and the actual discovery and fuccessful working of a new mine can alone afcertain the reality of its value, or even of its exiftence. In this fearch there feem to be no certain limits either to the poffible fuccefs, or to the poffible disappointment of human industry. In the course of a century or two, it is poffible that new mines may be discovered more fertile than any that have ever yet been known; and it is juft equally poffible that the moft fertile mine then known may be more barren than any that was wrought before the discovery of the mines of America. Whether the one or the other of those two events may happen to take place, is of very little importance to the real wealth and prosperity of the world, to the real value of the annual produce of the land and labour of mankind. Its nominal value, the quantity of gold and filver by which this annual produce could be expreffed or reprefented, would, no doubt, be very different; but its real value, the real quantity of labour which it could purchase or command, would be precifely the fame. A fhilling might in the one cafe represent no more labour than a penny does at present; and a penny in the other might re. prefent as much as a fhilling does now. But in the one cafe he who had a fhilling in his pocket, would be no richer than he who has a penny at prefent; and in the other, he who had a penny would be just as rich as he who has a fhilling now. The cheapnefs and abundance of gold and filver plate, would be the fole advantage XI. which the world could derive from the one event, C HA P. and the dearness and fcarcity of those trifling fuperfluities the only inconveniency it could fuffer from the other. Conclufion of the Digreffion concerning the Variations in the THE greater part of the writers who have col- |