Читать книгу Wealth of Nations - Adam Smith, George H. Smith - Страница 16

In 1350, and for some time before, the average price of the quarter of wheat in England seems not to have been estimated lower than four ounces of silver, Tower weight, equal to about twenty shillings of our present money. From this price it seems to have fallen gradually to two ounces of silver, equal to about ten shillings of our present money, the price at which we find it estimated in the beginning of the sixteenth century, and at which it seems to have continued to be estimated till about 1570.

In 1350, being the 25th of Edward III, was enacted what is called The Statute of Labourers. In the preamble it complains much of the insolence of servants, who endeavoured to raise their wages upon their masters. It therefore ordains that all servants and labourers should for the future be contented with the same wages and liveries (liveries in those times signified not only clothes but provisions) which they had been accustomed to receive in the 20th year of the king, and the four preceding years; that upon this account their livery wheat should nowhere be estimated higher than tenpence a bushel, and that it should always be in the option of the master to deliver them either the wheat or the money. Tenpence a bushel, therefore, had, in the 25th of Edward III, been reckoned a very moderate price of wheat, since it required a particular statute to oblige servants to accept of it in exchange for their usual livery of provisions; and it had been reckoned a reasonable price ten years before that, or in the 16th year of the king, the term to which the statute refers. But in the 16th year of Edward III, tenpence contained about half an ounce of silver, Tower weight, and was nearly equal to half-a-crown of our present money. Four ounces of silver, Tower weight, therefore, equal to six shillings and eightpence of the money of those times, and to near twenty shillings of that of the present, must have been reckoned a moderate price for the quarter of eight bushels.

This statute is surely a better evidence of what was reckoned in those times a moderate price of grain than the prices of some particular years which have generally been recorded by historians and other writers on account of their extraordinary dearness or cheapness, and from which, therefore, it is difficult to form any judgment concerning what may have been the ordinary price. There are, besides, other reasons for believing that in the beginning of the fourteenth century, and for some time before, the common price of wheat was not less than four ounces of silver the quarter, and that of other grain in proportion.

In 1309, Ralph de Born, prior of St. Augustine's, Canterbury, gave a feast upon his installation-day, of which William Thorn has preserved not only the bill of fare but the prices of many particulars. In that feast were consumed, first, fifty-three quarters of wheat, which cost nineteen pounds, or seven shillings and twopence a quarter, equal to about one-and-twenty shillings and sixpence of our present money; secondly, fifty-eight quarters of malt, which cost seventeen pounds ten shillings, or six shillings a quarter, equal to about eighteen shillings of our present money; thirdly, twenty quarters of oats, which cost four pounds, or four shillings a quarter, equal to about twelve shillings of our present money. The prices of malt and oats seem here to be higher than their ordinary proportion to the price of wheat.

These prices are not recorded on account of their extraordinary dearness or cheapness, but are mentioned accidentally as the prices actually paid for large quantities of grain consumed at a feast which was famous for its magnificence.

In 1262, being the 51st of Henry M, was revived an ancient statute called The Assize of Bread and Ale, which the king says in the preamble had been made in the times of his progenitors, sometime kings of England. It is probably, therefore, as old at least as the time of his grandfather Henry H, and may have been as old as the Conquest. It regulates the price of bread according as the prices of wheat may happen to be, from one shilling to twenty shillings the quarter of the money of those times. But statutes of this kind are generally presumed to provide with equal care for all deviations from the middle price, for those below it as well as for those above it. Ten shillings, therefore, containing six ounces of silver, Tower weight, and equal to about thirty shillings of our present money, must, upon this supposition, have been reckoned the middle price of the quarter of wheat when this statute was first enacted, and must have continued to be so in the 51st of Henry III. We cannot therefore be very wrong in supposing that the middle price was not less than one-third of the highest price at which this statute regulates the price of bread, or than six shillings and eightpence of the money of those times, containing four ounces of silver, Tower weight.

From these different facts, therefore, we seem to have some reason to conclude that, about the middle of the fourteenth century, and for a considerable time before, the average or ordinary price of the quarter of wheat was not supposed to be less than four ounces of silver, Tower weight.

From about the middle of the fourteenth to the beginning of the sixteenth century, what was reckoned the reasonable and moderate, that is the ordinary or average price of wheat, seems to have sunk gradually to about one-half of this price; so as at last to have fallen to about two ounces of silver, Tower weight, equal to about ten shillings of our present money. It continued to be estimated at this price till about 1570.

In the household book of Henry, the fifth Earl of Northumberland, drawn up in 1512, there are two different estimations of wheat. In one of them it is computed at six shillings and eightpence the quarter, in the other at five shillings and eightpence only. In 1512, six shillings and eightpence contained only two ounces of silver, Tower weight, and were equal to about ten shillings of our present money.

From the 25th of Edward III to the beginning of the reign of Elizabeth, during the space of more than two hundred years, six shillings and eightpence, it appears from several different statutes, had continued to be considered as what is called the moderate and reasonable, that is the ordinary or average price of wheat. The quantity of silver, however, contained in that nominal sum was, during the course of this period, continually diminishing, in consequence of some alterations which were made in the coin. But the increase of the value of silver had, it seems, so far compensated the diminution of the quantity of it contained in the same nominal sum that the legislature did not think it worth while to attend to this circumstance.

Thus in 1436 it was enacted that wheat might be exported without a licence when the price was so low as six shillings and eightpence; and in 1463 it was enacted that no wheat should be imported if the price was not above six shillings and eightpence the quarter. The legislature had imagined that when the price was so low there could be no inconveniency in exportation, but that when it rose higher it became prudent to allow importation. Six shillings and eightpence, therefore, containing about the same quantity of silver as thirteen shillings and fourpence of our present money (one third part less than the same nominal sum contained in the time of Edward III), had in those times been considered as what is called the moderate and reasonable price of wheat.

In 1554, by the 1st and 2nd of Philip and Mary; and in 1558, by the 1st of Elizabeth, the exportation of wheat was in the same manner prohibited, whenever the price of the quarter should exceed six shillings and eightpence, which did not then contain two pennyworth more silver than the same nominal sum does at present. But it had soon been found that to restrain the exportation of wheat till the price was so very low was, in reality, to prohibit it altogether. In 1562, therefore, by the 5th of Elizabeth, the exportation of wheat was allowed from certain ports whenever the price of the quarter should not exceed ten shillings, containing nearly the same quantity of silver as the like nominal sum does at present. This price had at this time, therefore, been considered as what is called the moderate and reasonable price of wheat. It agrees nearly with the estimation of the Northumberland book in 1512.

That in France the average price of grain was, in the same manner, much lower in the end of the fifteenth and beginning of the sixteenth century than in the two centuries preceding has been observed both by Mr. Dupre de St. Maur, and by the elegant author of the Essay on the police of grain. Its price, during the same period, had probably sunk in the same manner through the greater part of Europe.

This rise in the value of silver in proportion to that of corn, may either have been owing altogether to the increase of the demand for that metal, in consequence of increasing improvement and cultivation, the supply in the meantime continuing the same as before; or, the demand continuing the same as before, it may have been owing altogether to the gradual diminution of the supply; the greater part of the mines which were then known in the world being much exhausted, and consequently the expense of working them much increased; or it may have been owing partly to the other of those two circumstances. In the end of the fifteenth and beginning of the sixteenth centuries, the greater part of Europe was approaching towards a more settled form of government than it had enjoyed for several ages before. The increase of security would naturally increase industry and improvement; and the demand for the precious metals, as well as for every other luxury and ornament, would naturally increase with the increase of riches. A greater annual produce would require a greater quantity of coin to circulate it; and a greater number of rich people would require a greater quantity of plate and other ornaments of silver. It is natural to suppose, too, that the greater part of the mines which then supplied the European market with silver might be a good deal exhausted, and have become more expensive in the working. They had been wrought many of them from the time of the Romans.

It has been the opinion, however, of the greater part of those who have written upon the price of commodities in ancient times that, from the Conquest, perhaps from the invasion of Julius Caesar till the discovery of the mines of America, the value of silver was continually diminishing. This opinion they seem to have been led into, partly by the observations which they had occasion to make upon the prices both of corn and of some other parts of the rude produce of land; and partly by the popular notion that as the quantity of silver naturally increases in every country with the increase of wealth, so its value diminishes as its quantity increases.

In their observations upon the prices of corn, three different circumstances seem frequently to have misled them.

First, in ancient times almost all rents were paid in kind; in a certain quantity of corn, cattle, poultry, etc. It sometimes happened, however, that the landlord would stipulate that he should be at liberty to demand of the tenant, either the annual payment in kind, or a certain sum of money instead of it. The price at which the payment in kind was in this manner exchanged for a certain sum of money is in Scotland called the conversion price. As the option is always in the landlord to take either the substance or the price, it is necessary for the safety of the tenant that the conversion price should rather be below than above the average market price. In many places, accordingly, it is not much above one-half of this price. Through the greater part of Scotland this custom still continues with regard to poultry, and in some places with regard to cattle. It might probably have continued to take place, too, with regard to corn, had not the institution of the public fiars put an end to it. These are annual valuations, according to the judgment of an assize, of the average price of all the different sorts of grain, and of all the different qualities of each, according to the actual market price in every different county. This institution rendered it sufficiently safe for the tenant, and much more convenient for the landlord, to convert, as they call it, the corn rent, rather at what should happen to be the price of the fiars of each year, than at any certain fixed price. But the writers who have collected the prices of corn in ancient times seem frequently to have mistaken what is called in Scotland the conversion price for the actual market price. Fleetwood acknowledges, upon one occasion, that he had made this mistake. As he wrote his book, however, for a particular purpose, he does not think proper to make this acknowledgment till after transcribing this conversion price fifteen times. The price is eight shillings the quarter of wheat. This sum in 1423, the year at which he begins with it, contained the same quantity of silver as sixteen shillings of our present money. But in 1562, the year at which he ends with it, it contained no more than the same nominal sum does at present.

Secondly, they have been misled by the slovenly manner in which some ancient statutes of assize had been sometimes transcribed by lazy copiers; and sometimes perhaps actually composed by the legislature.

The ancient statutes of assize seem to have begun always with determining what ought to be the price of bread and ale when the price of wheat and barley were at the lowest, and to have proceeded gradually to determine what it ought to be, according as the prices of those two sorts of grain should gradually rise above this lowest price. But the transcribers of those statutes seem frequently to have thought it sufficient to copy the regulation as far as the three or four first and lowest prices, saving in this manner their own labour, and judging, I suppose, that this was enough to show what proportion ought to be observed in all higher prices.

Thus in the Assize of Bread and Ale, of the 51st of Henry III, the price of bread was regulated according to the different prices of wheat, from one shilling to twenty shillings the quarter, of the money of those times. But in the manuscripts from which all the different editions of the statutes, preceding that of Mr. Ruffhead, were printed, the copiers had never transcribed this regulation beyond the price of twelve shillings. Several writers, therefore, being misled by this faulty transcription, very naturally concluded that the middle price, or six shillings the quarter, equal to about eighteen shillings of our present money, was the ordinary or average price of wheat at that time.

In the Statute of Tumbrel and Pillory, enacted nearly about the same time, the price of ale is regulated according to every sixpence rise in the price of barley, from two shillings to four shillings the quarter. That four shillings, however, was not considered as the highest price to which barley might frequently rise in those times, and that these prices were only given as an example of the proportion which ought to be observed in all other prices, whether higher or lower, we may infer from the last words of the statute: et sic deinceps crescetur vel diminuetur per sex denarios. The expression is very slovenly, but the meaning is plain enough: "That the price of ale is in this manner to be increased or diminished according to every sixpence rise or fall in the price of barley." In the composition of this statute the legislature itself seems to have been as negligent as the copiers were in the transcription of the others.

In an ancient manuscript of the Regiam Majestatem, an old Scotch law book, there is a statute of assize in which the price of bread is regulated according to all the different prices of wheat, from tenpence to three shillings the Scotch boll, equal to about half an English quarter. Three shillings Scotch, at the time when this assize is supposed to have been enacted were equal to about nine shillings sterling of our present money. Mr. Ruddiman seems to conclude from this, that three shillings was the highest price to which wheat ever rose in those times, and that tenpence, a shilling, or at most two shillings, were the ordinary prices. Upon consulting the manuscript, however, it appears evidently that all these prices are only set down as examples of the proportion which ought to be observed between the respective prices of wheat and bread. The last words of the statute are: reliqua judicabis secundum proescripta habendo respectum ad pretium bladi. "You shall judge of the remaining cases according to what is above written, having a respect to the price of corn."

Thirdly, they seem to have been misled, too, by the very low price at which wheat was sometimes sold in very ancient times; and to have imagined that as its lowest price was then much lower than in later times, its ordinary price must likewise have been much lower. They might have found, however, that in those ancient times its highest price was fully as much above, as its lowest price was below anything that had even been known in later times. Thus in 1270, Fleetwood gives us two prices of the quarter of wheat. The one is four pounds sixteen shillings of the money of those times, equal to fourteen pounds eight shillings of that of the present; the other is six pounds eight shillings, equal to nineteen pounds four shillings of our present money. No price can be found in the end of the fifteenth, or beginning of the sixteenth century, which approaches to the extravagance of these. The price of corn, though at all times liable to variation, varies most in those turbulent and disorderly societies, in which the interruption of all commerce and communication hinders the plenty of one part of the country from relieving the scarcity of another. In the disorderly state of England under the Plantagenets, who governed it from about the middle of the twelfth till towards the end of the fifteenth century, one district might be in plenty, while another at no great distance, by having its crop destroyed either by some accident of the seasons, or by the incursion of some neighbouring baron, might be suffering all the horrors of a famine; and yet if the lands of some hostile lord were interposed between them, the one might not be able to give the least assistance to the other. Under the vigorous administration of the Tudors, who governed England during the latter part of the fifteenth and through the whole of the sixteenth century, no baron was powerful enough to dare to disturb the public security.

The reader will find at the end of this chapter all the prices of wheat which have been collected by Fleetwood from 1202 to 1597, both inclusive, reduced to the money of the present times, and digested according to the order of time, into seven divisions of twelve years each. At the end of each division, too, he will find the average price of the twelve years of which it consists. In that long period of time, Fleetwood has been able to collect the prices of no more than eighty years, so that four years are wanting to make out the last twelve years. I have added, therefore, from the accounts of Eton college, the prices of 1598, 1599, 1600, and 1601. It is the only addition which I have made. The reader will see that from the beginning of the thirteenth till after the middle of the sixteenth century the average price of each twelve years grows gradually lower and lower; and that towards the end of the sixteenth century it begins to rise again. The prices, indeed, which Fleetwood has been able to collect, seem to have been those chiefly which were remarkable for extraordinary dearness or cheapness; and I do not pretend that any very certain conclusion can be drawn from them. So far, however, as they prove anything at all, they confirm the account which I have been endeavouring to give. Fleetwood himself, however, seems, with most other writers, to have believed that during all this period the value of silver, in consequence of its increasing abundance, was continually diminishing. The prices of corn which he himself has collected certainly do not agree with this opinion. They agree perfectly with that of Mr. Dupre de St. Maur, and with that which I have been endeavouring to explain. Bishop Fleetwood and Mr. Dupre de St. Maur are the two authors who seem to have collected, with the greatest diligence and fidelity, the prices of things in ancient times. It is somewhat curious that, though their opinions are so very different, their facts, so far as they relate to the price of corn at least, should coincide so very exactly.

It is not, however, so much from the low price of corn as from that of some other parts of the rude produce of land that the most judicious writers have inferred the great value of silver in those very ancient times. Corn, it has been said, being a sort of manufacture, was, in those rude ages, much dearer in proportion than the greater part of other commodities; it is meant, I suppose, than the greater part of unmanufactured commodities, such as cattle, poultry, game of all kinds, etc. That in those times of poverty and barbarism these were proportionably much cheaper than corn is undoubtedly true. But this cheapness was not the effect of the high value of silver, but of the low value of those commodities. It was not because silver would in such times purchase or represent a greater quantity of labour, but because such commodities would purchase or represent a much smaller quantity than in times of more opulence and improvement. Silver must certainly be cheaper in Spanish America than in Europe; in the country where it is produced than in the country to which it is brought, at the expense of a long carriage both by land and by sea, of a freight and an insurance. One-and-twenty pence halfpenny sterling, however, we are told by Ulloa, was, not many years ago, at Buenos Ayres, the price of an ox chosen from a herd of three or four hundred. Sixteen shillings sterling, we are told by Mr. Byron was the price of a good horse in the capital of Chili. In a country naturally fertile, but of which the far greater part is altogether uncultivated, cattle, poultry, game of all kinds, etc., as they can be acquired with a very small quantity of labour, so they will purchase or command but a very small quantity. The low money price for which they may be sold is no proof that the real value of silver is there very high, but that the real value of those commodities is very low.

Labour, it must always be remembered, and not any particular commodity or set of commodities, is the real measure of the value both of silver and of all other commodities.

But in countries almost waste, or but thinly inhabited, cattle, poultry, game of all kinds, etc., as they are the spontaneous productions of nature, so she frequently produces them in much greater quantities than the consumption of the inhabitants requires. In such a state of things the supply commonly exceeds the demand. In different states of society, in different stages of improvement, therefore, such commodities will represent, or be equivalent to, very different quantities of labour.

In every state of society, in every stage of improvement, corn is the production of human industry. But the average produce of every sort of industry is always suited, more or less exactly, to the average consumption; the average supply to the average demand. In every different stage of improvement, besides, the raising of equal quantities of corn in the same soil and climate will, at an average, require nearly equal quantities of labour; or what comes to the same thing, the price of nearly equal quantities; the continual increase of the productive powers of labour in an improving state of cultivation being more or less counterbalanced by the continually increasing price of cattle, the principal instruments of agriculture. Upon all these accounts, therefore, we may rest assured that equal quantities of corn will, in every state of society, in every stage of improvement, more nearly represent, or be equivalent to, equal quantities of labour than equal quantities of any other part of the rude produce of land. Corn, accordingly, it has already been observed, is, in all the different stages of wealth and improvement, a more accurate measure of value than any other commodity or set of commodities. In all those different stages, therefore, we can judge better of the real value of silver by comparing it with corn than by comparing it with any other commodity or set of commodities.

Corn, besides, or whatever else is the common and favourite vegetable food of the people, constitutes, in every civilised country, the principal part of the subsistence of the labourer. In consequence of the extension of agriculture, the land of every country produces a much greater quantity of vegetable than of animal food, and the labourer everywhere lives chiefly upon the wholesome food that is cheapest and most abundant. Butcher's meat, except in the most thriving countries, or where labour is most highly rewarded, makes but an insignificant part of his subsistence; poultry makes a still smaller part of it, and game no part of it. In France, and even in Scotland, where labour is somewhat better rewarded than in France, the labouring poor seldom eat butcher's meat, except upon holidays, and other extraordinary occasions. The money price of labour, therefore, depends much more upon the average money price of corn, the subsistence of the labourer, than upon that of butcher's meat, or of any other part of the rude produce of land. The real value of gold and silver, therefore, the real quantity of labour which they can purchase or command, depends much more upon the quantity of corn which they can purchase or command than upon that of butcher's meat, or any other part of the rude produce of land.

Such slight observations, however, upon the prices either of corn or of other commodities, would not probably have misled so many intelligent authors had they not been influenced, at the same time, by the popular notion, that as the quantity of silver naturally increases in every country with the increase of so its value diminishes as its quantity increases. This notion, however, seems to be altogether groundless.

The quantity of the precious metals may increase in any country from two different causes; either, first, from the increased abundance of the mines which supply it; or, secondly, from the increased wealth of the people, from the increased produce of their annual labour. The first of these causes is no doubt necessarily connected with the diminution of the value of the precious metals, but the second is not.

When more abundant mines are discovered, a greater quantity of the precious metals is brought to market, and the quantity of the necessaries and conveniencies of life for which they must be exchanged being the same as before, equal quantities of the metals must be exchanged for smaller quantities of commodities. So far, therefore, as the increase of the quantity of the precious metals in any country arises from the increased abundance of the mines, it is necessarily connected with some diminution of their value.

When, on the contrary, the wealth of any country increases, when the annual produce of its labour becomes gradually greater and greater, a greater quantity of coin becomes necessary in order to circulate a greater quantity of commodities; and the people, as they can afford it, as they have more commodities to give for it, will naturally purchase a greater and a greater quantity of plate. The quantity of their coin will increase from necessity; the quantity of their plate from vanity and ostentation, or from the same reason that the quantity of fine statues, pictures, and of every other luxury and curiosity, is likely to increase among them. But as statuaries and painters are not likely to be worse rewarded in times of wealth and prosperity than in times of poverty and depression, so gold and silver are not likely to be worse paid for.

The price of gold and silver, when the accidental discovery of more abundant mines does not keep it down, as it naturally rises with the wealth of every country, so, whatever be the state of the mines, it is at all times naturally higher in a rich than in a poor country. Gold and silver, like all other commodities, naturally seek the market where the best price is given for them, and the best price is commonly given for every thing in the country which can best afford it. Labour, it must be remembered, is the ultimate price which is paid for everything, and in countries where labour is equally well regarded, the money price of labour will be in proportion to that of the subsistence of the labourer. But gold and silver will naturally exchange for a greater quantity of subsistence in a rich than in a poor country, in a country which abounds with subsistence than in one which is but indifferently supplied with it. If the two countries are at a great distance, the difference may be very great; because though the metals naturally fly from the worse to the better market, yet it may be difficult to transport them in such quantities as to bring their price nearly to a level in both. If the countries are near, the difference will be smaller, and may sometimes be scarce perceptible; because in this case the transportation will be easy. China is a much richer country than any part of Europe, and the difference between the price of subsistence in China and in Europe is very great. Rice in China is much cheaper than wheat is anywhere in Europe. England is a much richer country than Scotland; but the difference between the money-price of corn in those two countries is much smaller, and is but just perceptible. In proportion to the quantity or measure, Scotch corn generally appears to be a good deal cheaper than English; but in proportion to its quality, it is certainly somewhat dearer. Scotland receives almost every year very large supplies from England, and every commodity must commonly be somewhat dearer in the country to which it is brought than in that from which it comes. English corn, therefore, must be dearer in Scotland than in England, and yet in proportion to its quality, or to the quantity and goodness of the flour or meal which can be made from it, it cannot commonly be sold higher there than the Scotch corn which comes to market in competition with it.

The difference between the money price of labour in China and in Europe is still greater than that between the money price of subsistence; because the real recompense of labour is higher in Europe than in China, the greater part of Europe being in an improving state, while China seems to be standing still. The money price of labour is lower in Scotland than in England because the real recompense of labour is much lower; Scotland, though advancing to greater wealth, advancing much more slowly than England. The frequency of emigration from Scotland, and the rarity of it from England, sufficiently prove that the demand for labour is very different in the two countries. The proportion between the real recompense of labour in different countries, it must be remembered, is naturally regulated not by their actual wealth or poverty, but by their advancing, stationary, or declining condition.

Gold and silver, as they are naturally of the greatest value among the richest, so they are naturally of the least value among the poorest nations. Among savages, the poorest of all nations, they are of scarce any value.

In great towns corn is always dearer than in remote parts of the country. This, however, is the effect, not of the real cheapness of silver, but of the real dearness of corn. It does not cost less labour to bring silver to the great town than to the remote parts of the country; but it costs a great deal more to bring corn.

In some very rich and commercial countries, such as Holland and the territory of Genoa, corn is dear for the same reason that it is dear in great towns. They do not produce enough to maintain their inhabitants. They are rich in the industry and skill of their artificers and manufacturers; in every sort of machinery which can facilitate and abridge labour; in shipping, and in all the other instruments and means of carriage and commerce: but they are poor in corn, which, as it must be brought to them from distant countries, must, by an addition to its price, pay for the carriage from those countries. It does not cost less labour to bring silver to Amsterdam than to Dantzic; but it costs a great deal more to bring corn. The real cost of silver must be nearly the same in both places; but that of corn must be very different. Diminish the real opulence either of Holland or of the territory of Genoa, while the number of their inhabitants remains the same: diminish their power of supplying themselves from distant countries; and the price of corn, instead of sinking with that diminution in the quantity of their silver, which must necessarily accompany this declension either as its cause or as its effect, will rise to the price of a famine. When we are in want of necessaries we must part with all superfluities, of which the value, as it rises in times of opulence and prosperity, so it sinks in times of poverty and distress. It is otherwise with necessaries. Their real price, the quantity of labour which they can purchase or command, rises in times of poverty and distress, and sinks in times of opulence and prosperity, which are always times of great abundance; for they could not otherwise be times of opulence and prosperity. Corn is a necessary, silver is only a superfluity.

Whatever, therefore, may have been the increase in the quantity of the precious metals, which, during the period between the middle of the fourteenth and that of the sixteenth century, arose from the increase of wealth and improvement, it could have no tendency to diminish their value either in Great Britain or in any other part of Europe. If those who have collected the prices of things in ancient times, therefore, had, during this period, no reason to infer the diminution of the value of silver, from any observations which they had made upon the prices either of corn or of other commodities, they had still less reason to infer it from any supposed increase of wealth and improvement.