"Such emissions certainly fall within the spirit, if not within the letter, of the constitutional prohibition of the emission of 'bills of credit' by the states, and of the making by them of anything except gold and silver coin a legal tender in payment of debts. However this may be, it is too clear to be reasonably disputed that Congress, under its constitutional powers to lay taxes, to regulate commerce, and to regulate the value of coin, possesses ample authority to control the credit circulation which enters so largely into the transaction of commerce, and affects in so many ways the value of coin. In the judgment of the secretary, the time has arrived when Congress should exercise this authority." He described with great force the weakness of the state banking system, and the repeated losses by the people of the United States on account of the failure of such banks. He recommended two plans by either of which he held that these banks might be absorbed, and a national currency be substituted in the place of their issues. One plan proposed the gradual withdrawal from circulation of the notes of private corporations, and the issue in their stead of United States notes, payable in coin on demand, in amounts sufficient for the useful ends of a representative currency. The other proposed a system of national banks authorized to issue notes for circulation under national direction, to be secured as to prompt convertibility into coin by the pledge of United States bonds and other needful regulations. He discussed these two plans at length, but concluded by recommending a system of national banks, the advantages of which would be uniformity in currency, uniformity in security, an effectual safeguard against depreciation, and protection from losses from discounts and exchanges. He expressed the opinion that such notes would give to the government the further advantage of a large demand for government securities, of increased facilities for obtaining the loans required for the war, a reduction of interest, and a participation by the government in the profit of circulation without risking the perils of a great money monopoly. It will be noticed that the secretary nowhere suggested the suspension of coin payments, or making the notes a legal tender in payment of public and private debts, or the redemption in coin of the bank notes to be issued.