Now look at Mexican exports. The larger part in value of these exports is silver in some form, mostly in the form of silver dollars. But these silver dollars are merchandise in London, and quite variable in price there, as has already been shown; and bills of exchange drawn on this silver in any form, and sold in Mexico to parties remitting gold values to London, are subject to constant depression on account of the uncertainty as to the value of silver in gold when the bills reach London. It follows from this, that the use of the silver standard in Mexico actually depresses the value of silver there. By means of the "exchanges" both ways, silver tends to be still further depreciated in comparison with gold, retail prices of all importables enhanced in silver, and the chief exportable (silver) depressed in value all the while! Truly, the Mexicans are between the upper and nether millstones. Poor Money never pays.

In confirmation of this fact that Mexico has not lifted the relative value of silver by making it the sole Measure of Value, we have the corresponding fact that the herculean efforts of the United States since 1878 to advance the value of silver to a parity with that of gold in the legal ratio of 1:15.98, have issued in the constant relative decline of silver here; and, what is more surprising, in an almost constant increase of the yearly production of silver here. The following table tells the whole instructive story: the figures are official: commercial "fine ounces" are .915 of technically "fine" silver.

Year.Production (fine ounces).Average Price.Year.Production (fine ounces).Average Price.
187834,960,000$1.15188437,800,000$1.11
187931,550,0001.12188539,910,0001.06
188030,320,0001.14188639,440,000.99
188133,260,0001.13188741,260,000.97
188236,200,0001.13188845,780,000.93
188335,730,0001.11

These Seven, then, are the essential Principles of Foreign Trade, brought out, it is hoped, as clearly and consecutively as the relative and complicated nature of the transactions will allow; in the light of these Principles it is very clear, that Foreign Trade is just as legitimate as, and may be more profitable than, Domestic Trade; that it rests on the same ultimate and unchangeable grounds in the constitution of Man, and in the Providential arrangements of Nature; that the Profit of it is mutual to both parties, or it would never come into being, or, coming into being, would cease of itself; that to prohibit it, or restrict it, otherwise than in the interest of Morals, Health, or Revenue, must find its justification, if any at all, wholly outside the pale of Political Economy; and that for any Government to say to its citizens (of whom Government itself is only a Committee), who may wish to render commercial services to foreigners in order to receive back similar services in return, that such services shall neither be rendered nor received, is not only to destroy a Gain to both parties, but also to interfere losingly with a natural and inalienable Right belonging to both.

If the reader pleases, we will turn now, in the second place, to the Methods and Motives in vogue to restrict and prohibit Foreign Trade. The instrument for this purpose is called a Tariff. The origin of the word Tariff, its nature and kinds, will throw much light upon what has been a vexed question, but is one easily solvable, and indeed long ago resolved.

1. Origin.—When the Moors from Africa conquered Spain in the year of our Lord 711, they fortified the southernmost point of the peninsula where it juts down into the Straits of Gibraltar, and by means of their castle and town, called in their Barbary language Tarifa, compelled all vessels passing through the Straits to stop and to pay to these Moorish lords of the castle a certain part (determined by themselves) of the value of the cargoes. This payment appears to have been blackmail pure and simple; it was certainly extorted by force; and whether there were any pretence of a return-service in the form of promised exemption from further pillage or not, that made no real difference in the nature of the transaction. Eleven centuries later, the United States demonstrated what they thought about similar extortions on American commerce practised in the same waters by the descendants of these same Moors, by despatching Commodore Decatur with a strong fleet to Algiers and Tunis and Tripoli; to which piratical states they had already paid in twenty-five years two millions of dollars in "tribute" or "presents" for exemptions of their Mediterranean commerce from plunder; who captured the pirate ships and compelled the terrified Dey of Algiers (and the rest) to renounce all claim thereafter to American "tribute" or "presents" of any kind. The word Tarifa, accordingly, in English and other modern languages, a word which seems to be very dear to some men's hearts, does not appear to have had a very respectable origin, though that is not sufficient of itself to condemn the thing described by the word. That will depend upon its nature and purposes.

2. Its nature.—There never was one particle of doubt on the part of those compelled to pay the Moorish demands at Tarifa, or on the part of the United States compelled to pay "tribute" to the Algerines for a quarter of a century, about the nature of the transaction. The sign at Tarifa was minus, and not plus. To the credit of those pirates let it be said, that they never pretended to take what they took for the benefit of those from whom they took it. They took it for their own benefit. The action was abominable, but it was aboveboard. There was no deceit and no pretence about it. Both parties knew perfectly what was going on. What was delivered was just so much out from what would otherwise have been the gains of the voyage. And the truth is, the thing, tariff, is always true to the origin of the word, tariff, so far as this, that a tariff always takes, and never gives. The only phrase a tariff speaks, or can speak, is, Thou shalt pay! There is lying open on the table of the writer at this moment a stout volume of 417 pages, printed, with nearly as many more interleaved, entitled Tariff Compilation, published by the United States Senate in 1884, containing every item of all the tariffs passed by Congress from 1789 to the present time. One may read this volume from beginning to the end, or he may read it from the end backwards to the beginning, or he may begin in the middle and read both ways, and all he will find between the covers is a series of Demands made upon somebody to pay something. These demands, of course, are made upon, and realized from, the citizens of the United States, who are the only people under the authority and jurisdiction of the Congress. A tariff, then, may be correctly defined as a body of takings or taxings levied upon the people of any country by their own government on their exchanges with foreigners. How anybody can intelligently suppose that a body of taxes, which their own countrymen will have to pay, can be so cunningly adjusted as to become to them a positively productive agent, a blessing and enrichment to the payers, a spur to the progress of their Society, they may be properly called upon to explain who pretend to believe such an absurdity in the nature of things.

3. Its kinds.—There are two kinds of Tariffs under our general definition, very diverse from each other in their respective purposes, principles, incidence, and results.

(1) There is a tariff for Revenue. The sole purpose of a revenue tariff as such is to get money by this mode of indirect taxation out of the pockets of the People for the coffers of the Government, in order to be then expended, governmentally, for the general benefit of those who have paid the money in for that single end. The underlying thought of this kind of tariff, a tariff for revenue only, is, that the Government itself shall get all the money which the people are obliged to pay under these taxes, except the bare cost of collecting them; that only such taxes shall be levied at all as will come bodily and readily into the general Treasury for public uses; and no intelligent and justice-loving people will long tolerate tariff-taxes laid with any other intent than the economical support of their government, or laid in any other way than shall bring into the Treasury all that is taken out of the People. A Revenue Tariff, therefore, may be properly defined as a schedule of taxes levied on certain imported goods with an eye only to just and general taxation.

There are three vital principles on which a revenue tariff as such must always be levied. (a) As the sole object is to get money for the national treasury, and as money can only be gotten as the foreign goods taxed are allowed to come in, such taxes must be levied at a low rate on each article taxed, so as not to interfere essentially with the bringing in of that class of goods with a profit to the importers, and not at all to encourage the smuggling of them in. (b) A varied experience of all the commercial nations has shown, that it is not needful in order to derive a large and growing revenue to lay even low rates on all goods imported, but only on certain classes of them, so as to burden at as few points as possible the successful ongoing of international exchanges; since the prosperity ever induced by commercial freedom enables a country to import and to pay for in its own quickened products vast quantities of the articles subjected to the tax, so that large revenues come from low rates levied at few points. Here we lay bare the ground of a great income in the exemption of the bulk of imports from any tax at all. (c) Custom-taxes should be laid wholly or at least mainly on articles procured from abroad, and not also produced at home; for otherwise the incidence of the tax on the portion imported will necessarily raise the price also of that portion made or grown at home; and thus the people will pay more money in consequence of the tax than the Government gets from the tax in revenue. Three points, then, in a revenue tariff, namely, low duties on few articles, and these wholly foreign.