What a vast field would the exercise of this power open for jobbing and corruption! Members of Congress, from an honest desire to promote the interest of their constituents, would struggle for improvements within their own districts, and the body itself must necessarily be converted into an arena where each would endeavor to obtain from the Treasury as much money as possible for his own locality. The temptation would prove irresistible. A system of "_logrolling_" (I know no word so expressive) would be inaugurated, under which the Treasury would be exhausted and the Federal Government be deprived of the means necessary to execute those great powers clearly confided to it by the Constitution for the purpose of promoting the interests and vindicating the honor of the country. Whilst the power over internal improvements, it is believed, was "reserved to the States respectively," the framers of the Constitution were not unmindful that it might be proper for the State legislatures to possess the power to impose tonnage duties for the improvement of rivers and harbors within their limits. The self-interest of the different localities would prevent this from being done to such an extent as to injure their trade. The Constitution, therefore, which had in a previous clause provided that all duties should be uniform throughout the United States, subsequently modified the general rule so far as to declare that "no State shall without the consent of Congress levy any duty of tonnage." The inference is therefore irresistible that with the consent of Congress such a duty may be imposed by the States. Thus those directly interested in the improvement may lay a tonnage duty for its construction without imposing a tax for this purpose upon all the people of the United States. To this provision several of the States resorted until the period when they began to look to the Federal Treasury instead of depending upon their own exertions. Massachusetts, Rhode Island, Pennsylvania, Maryland, Virginia, North Carolina, South Carolina, and Georgia, with the consent of Congress, imposed small tonnage duties on vessels at different periods for clearing and deepening the channels of rivers and improving harbors where such vessels entered. The last of these legislative acts believed to exist is that of Virginia, passed on the 22d February, 1826, levying a tonnage duty on vessels for "improving the navigation of James River from Warwick to Rocketts Landing." The latest act of Congress on this subject was passed on the 24th of February, 1843, giving its consent to the law of the legislature of Maryland laying a tonnage duty on vessels for the improvement of the harbor of Baltimore, and continuing it in force until 1st June, 1850.