Congress may also impose duties, imposts, and excises to pay the debts and provide for the common defence and general welfare, but the congress cannot lay any tax or duty on articles exported from any state, nor can congress give any preference by any regulation of commerce or revenue to the ports of one state over those of another, as the exercise of any such power is prohibited by the constitution. Exclusive power is vested in congress to declare war, to raise and support armies, to provide and maintain a navy, and to make rules for the government and regulation of the land and naval forces. Appropriations to execute those powers may be made by congress, but no appropriations of money to that use can be made for a longer term than two years, as an appropriation for a longer term is expressly prohibited by the same clause which confers the power to raise and support armies. By virtue of those grants of power congress may erect forts and magazines, may construct navy-yards and dock-yards, manufacture arms and munitions of war, and may establish depots and other needful buildings for their preservation, but the congress cannot take private property for that purpose without making compensation to the owner, as the constitution provides that private property shall not be taken for public use without just compensation.
Legislative power under the constitution can never be rightfully extended to the exercise of a power not granted nor to that which is prohibited, and it makes no difference whether the prohibition is express or implied, as an implied prohibition, when once ascertained, is as effectual to negative the right to legislate as one that is expressed; the rule being that congress, in passing laws to carry the express powers granted into execution, cannot select any means as requisite for that purpose or as fairly applicable to the attainment of the end, which are precluded by restrictions or exceptions contained in the constitution, or which are contrary to the essential ends of political society.
Concede these premises, and it follows that the acts of congress in question cannot be regarded as valid unless it can be held that the power to make paper emissions a legal tender in payment of debts can properly be implied from the power to coin money, and that such emissions, when enforced by such a provision, become the legal standard of value under the constitution. Extended discussion of the first branch of the proposition would seem to be unnecessary, as the dissenting justices in the former case abandoned that point and frankly stated in the dissenting opinion delivered that they were not able to see in those clauses, "standing alone, a sufficient warrant for the exercise of this power." Through their organ on the occasion they referred to the power to declare war, to suppress insurrection, to raise and support armies, to provide and maintain a navy, to borrow money, to pay the debts of the Union, and to provide for the common defence and general welfare, as grants of power conferred in separate clauses of the constitution. Reference was then made in very appropriate terms to the exigencies of the treasury during that period and the conclusion reached, though expressed interrogatively, appears to be that the provision making the notes a legal tender was a necessary and proper one as conducing "towards the purpose of borrowing money, of paying debts, of raising armies, of suppressing insurrection," or, as expressed in another part of the same opinion, the provision was regarded as "necessary and proper to enable the government to borrow money to carry on the war."
Suggestions or intimations are made in one or more of the opinions given in the state courts that the power assumed by congress may be vindicated as properly implied from the power to coin money, but inasmuch as that assumption was not the ground of the dissent in the former case, and as the court is not referred to any case where a court affirming the validity of the acts of congress in question has ventured to rest their decision upon that theory, it does not appear to be necessary to protract the discussion upon that point.
Such notes are not declared in the acts of congress to be a standard of value, and if they were the provision would be as powerless to impart that quality to the notes as were the processes of the alchemist to convert chalk into gold, or the contrivances of the mechanic to organize a machine and give it perpetual motion. Gold and silver were adopted as the standard of value, even before civil governments were organized, and they have always been regarded as such to the present time, and it is safe to affirm that they will continue to be such by universal consent, in spite of legislative enactments and of judicial decisions. Treasury notes, or the notes in question, called by what name they may be, never performed that office, even for a day, and it may be added that neither legislative enactments nor judicial decisions can compel the commercial world to accept paper emissions of any kind as the standard of value by which all other values are to be measured. Nothing but money will in fact perform that office, and it is clear that neither legislative enactments nor judicial decisions can perform commercial impossibilities. Commodities undoubtedly may be exchanged as matter of barter, or the seller may accept paper promises instead of money, but it is nevertheless true, as stated by Mr. Huskisson, that money is not only the common measure and common representative of all other commodities, but also the common and universal equivalent. Whoever buys, gives, whoever sells, receives such a quantity of pure gold or silver as is equivalent to the article bought or sold; or if he gives or receives paper instead of money, he gives and receives that which is valuable only as it stipulates the payment of a given quantity of gold or silver.
"Most unquestionably," said Mr. Webster, "there is no legal tender, and there can be no legal tender, in this country, under the authority of this government, or any other, but gold and silver. * * This is a constitutional principle, perfectly plain and of the very highest importance." He admitted that no such express prohibition was contained in the constitution, and then proceeded to say: "As Congress has no power granted to it in this respect but to coin money and to regulate the value of foreign coins, it clearly has no power to substitute paper or anything else for coin as a tender in payment of debts and in discharge of contracts," adding that "Congress has exercised the power fully in both its branches. It has coined money and still coins it, it has regulated the value of foreign coins and still regulates their value. The legal tender, therefore, the constitutional standard of value, is established and cannot be overthrown." Beyond peradventure he was of the opinion that gold and silver, at rates fixed by congress, constituted the legal standard of value, and that neither congress nor the states had authority to establish any other standard in its place.
Views equally decisive have been expressed by this court in a case where the remarks were pertinent to the question presented for decision. Certain questions were certified here which arose in the circuit court in the trial of an indictment in which the defendant was charged with having brought into the United States from a foreign place, with intent to pass, utter, publish, and sell certain false, forged, and counterfeit coins, made, forged, and counterfeited in the resemblance and similitude of the coins struck at the mint. Doubts were raised at the trial whether congress had the power to pass the law on which the indictment was founded. Objection was made that the acts charged were only a fraud in traffic, and, as such, were punishable, if at all, under the state law. Responsive to that suggestion the court say that the provisions of the section "appertain rather to the execution of an important trust invested by the constitution, and to the obligation to fulfil that trust on the part of the government, namely, the trust and the duty of creating and maintaining a uniform and pure metallic standard of value throughout the Union; that the power of coining money and of regulating its value was delegated to congress by the constitution for the very purpose of creating and preserving the uniformity and purity of such a standard of value, and on account of the impossibility which was foreseen of otherwise preventing the inequalities and the confusion necessarily incident to the different views of policy which in different communities would be brought to bear on this subject. The power to coin money being thus given to congress, founded on public necessity, it must carry with it the correlative power of protecting the creature and object of that power." Appropriate suggestions follow as to the right of the government to adopt measures to exclude counterfeits and prevent the true coin from being substituted by others of no intrinsic value, and the justice delivering the opinion then proceeds to say, that congress "having emitted a circulating medium, a standard of value indispensable for the purposes of the community and for the action of the government itself, the congress is accordingly authorized and bound in duty to prevent its debasement and expulsion and the destruction of the general confidence and convenience by the influx and substitution of a spurious coin in lieu of the constitutional currency."
Equally decisive views were expressed by the court six years earlier, in the case of Gwin v. Breedlove, in which the opinion of the court was delivered by the late Mr. Justice Catron, than whom no justice who ever sat in the court was more opposed to the expression of an opinion on a point not involved in the record.
No state shall coin money, emit bills of credit, or make anything but gold and silver a tender in payment of debts. These prohibitions, said Mr. Justice Washington, associated with the powers granted to congress to coin money and regulate the value thereof and foreign coin, most obviously constitute members of the same family, being upon the same subject and governed by the same policy. This policy, said the learned justice, was to provide and fix a uniform standard of value throughout the United States, by which the commercial and other dealings between the citizens thereof, or between them and foreigners, as well as the moneyed transactions of the government, should be regulated. Language so well chosen and so explicit cannot be misunderstood, and the views expressed by Mr. Justice Johnson in the same case are even more decisive. He said the prohibition in the constitution to make anything but gold or silver coin a tender in payment of debts is express and universal. The framers of the constitution regarded it as an evil to be repelled without modification, and that they have therefore left nothing to be inferred or deduced from construction on the subject.
Recorded as those opinions have been for forty-five years, and never questioned, they are certainly entitled to much weight, especially as the principles which are there laid down were subsequently affirmed in two cases by the unanimous opinion of this court.