The first ten months' yield (March 1, 1913, to December 31, 1913) was over $60,000,000. A remarkable fact is that 21 per cent of all taxable incomes (not persons) were in the single Borough of Manhattan (the main part of New York City). The receipts from the income tax in 1913 were nearly 10 per cent of the ordinary receipts of the federal government, and about 2 per cent of total revenue receipts of all branches of government, the income taxes paid by individuals being about 1 per cent of the same total, and the super-tax about 1/2 per cent of the same. The receipts from the income tax during the fiscal year ending June 30, 1915, were $80,000,000, of which $39,000,000 was paid by corporations and $41,000,000 by individuals. Of the latter sum, over $24,000,000 was from the super-tax. § 10. #A system of taxation.# The task of reforming and developing the various kinds of taxes and of uniting them into a just and consistent plan for each of the divisions of government in the United States is a vast and difficult one. There are many conflicting interests among states, between states and nation, among the various minor political divisions, and among individuals and classes. There are also conflicting opinions regarding many features of the possible practical plans. Because of these it is safe to predict that progress will not be made quickly, steadily, nor always directed toward a clear ideal. If progress is to be rapid, the public must, however, have consistent principles by which its steps may be guided. In the foregoing kinds of taxation are the various elements which may be united into a system of taxation. It is useful to consider how this might be done. At the basis of the whole tax structure is taxation, by value, of concrete wealth at the place where it is situated (_in situ_). This should be regardless of the distribution of ownership or of the residence of the owner. The present misnamed "general property tax" already presents the main outlines of this form of taxation and the general changes necessary in law and method of assessment have been indicated above.[12] Corporation taxation may be adjusted to this either by separate treatment and assignment to state purposes only, or more simply for most states, by assimilating it with the general taxation of wealth and allotting due shares of the proceeds to the various taxing divisions.[13] The national government can, because of its exclusive power of levying tariff duties and also because of its exclusive control over interstate commerce, reach the tax-paying ability of the nation effectively by a combination of tariff and internal revenue taxes. These become a part of business costs, and are diffused over the whole population in general prices.[14]