The rate of tariff was based upon the probable revenue, the protective principle, and the tax burdens already imposed upon American manufacturers. Not until 1863 were the internal or direct taxes noticeable, but in 1864 these passed the tariff as a source of revenue, with a total of $116,000,000. In 1866 this total was swollen to $211,000,000. Like the tariff, the income, excise, and direct taxes were often revised and raised, and many of the tariff increases were dependent upon them. When the American manufacturer, who already declared that he could stay in business only because the tariff protected him from European competition, found himself burdened with a tax on his income and with others upon his commercial transactions and his output, he complained bitterly of the disadvantage at which he was placed. To equalize his burdens, the import rates were repeatedly raised against the foreigner. By the end of the war, the tariff exceeded anything known in American experience, and was fixed less with the intention of raising revenue than of enabling the American producer to pay his internal tax. Less than $85,000,000 were collected from the customs in 1865; while $211,000,000 came from internal sources. By taxing and borrowing the United States accumulated $88,000,000 in 1861, $589,000,000 in 1862, $888,000,000 in 1863, $1,408,000,000 in 1864, and $1,826,000,000 in 1865. The Treasury, unimportant in the world's affairs before 1861, suddenly became one of the greatest dealers in credit. Its debt of $2,808,000,000, outstanding in October, 1865, affected the interests and solidity of international finance, and indicated, as well, resources of which even boastful Americans had been unaware in 1861. One item in the debt, however, was a menace to the security of the whole, which was but little stronger than its weakest part. The physical currency in which the debt was to be created and the expenses paid was as difficult to find in 1861 as the wealth which it measured. After Jackson destroyed the second Bank of the United States there had been no national currency but coin, and too little of that. Gold and silver had been coined at the mint, and the former had given the standard to the dollar. In intrinsic worth the gold dollar, as defined in 1834 at the ratio of sixteen to one, was slightly inferior to its silver associate, and by the law of human nature, which induces men to hold the better and pass the cheaper money, the value of the gold coin had become the measure of exchange.