Legal Tender – by James Bradley Thayer

The questions present themselves, Can Congress emit bills? Can it make them a legal tender? Can it make anything else a legal tender? In answer to the last of these questions, all agree that Congress can make coin a legal tender,—any coin. It is not restricted to its own coin; and it is not restricted to gold and silver. The power to do this is fairly, although not necessarily, implied in that of coining and regulating the value of coin.