As we have seen, the Constitution was far-seeing and lucid in its definition of the character of the revenues of the National Treasury: that is, in fixing upon the customs duties, the sale and allocation of land, the products of the Posts, and other contributions to be imposed by Congress for normal situations in a proportional and equitable manner; and also in deciding upon the imposition of direct taxation for determined periods, and relatively equal all over the country, for exceptional and abnormal times. According to the commentator quoted above, when the Constitution left Congress the faculty of establishing, equitably and in due proportion, taxes of other kinds, and abstained from naming them or limiting them to a fixed number, it was because it wished to give the legislature the right of adopting all those recognised by economic science, in order that they might be imposed according to the principles of the Constitution itself. If we now cast an eye over the table of the national revenue, we shall see that in 1908 the nation collected, in the form of direct taxes, the sum of £583,344; in the form of indirect taxes, £4,803,920; for the remuneration of services, a sum of £1,023,440, which had not the character of direct taxation; as the usufruct of land belonging to the national domain, and the profits of national undertakings, £2,510,240; and as capitation fees, £8,000. We must also include in the receipts the sums contributed by some of the provinces, and by the National Bank, to the service of the national debt; guaranteed, on their account, by the National Treasury. If we add together all these sums, which for one reason or another were placed to the account of the nation in 1908, we arrive at a general total of £22,392,160. This revenue may be analysed as follows:—— The group of direct taxes is formed by the land-tax of the city of Buenos Ayres and of the National Territories, which figures in the balance-sheet as a sum of £320,320. In reality the product of this tax is greater——amounting to more than £616,000——but the nation is by law compelled to give a certain proportion of this sum to the Municipality and another to the National Council of Education; what remains when these obligations are satisfied belongs to the Government. The commercial and industrial licences of the Federal capital and the National Territories form the second class of direct taxes, their yield being £245,520; but, as in the case of the land tax, the Government has to give part of this sum to the city and part to the Council of Education. The indirect taxes are those which produce the largest yield: they include the customs duties upon imports, which in 1908 yielded £12,036,000. The consular duties brought in £100,000; stamps and fees accounted for £118,000.