It can not be doubted that improvements for great national purposes would be better made by the National Government than by the governments of the several States. Our experience prior to the adoption of the Constitution demonstrated that in the exercise by the individual States of most of the powers granted to the United States a contracted rivalry of interest and misapplied jealousy of each other had an important influence on all their measures to the great injury of the whole. This was particularly exemplified by the regulations which they severally made of their commerce with foreign nations and with each other. It was this utter incapacity in the State governments, proceeding from these and other causes, to act as a nation and to perform all the duties which the nation owed to itself under any system which left the General Government dependent on the States, which produced the transfer of these powers to the United States by the establishment of the present Constitution. The reasoning which was applicable to the grant of any of the powers now vested in Congress is likewise so, at least to a certain extent, to that in question. It is natural that the States individually in making improvements should look to their particular and local interests, The members composing their respective legislatures represent the people of each State only, and might not feel themselves at liberty to look to objects in these respects beyond that limit. If the resources of the Union were to be brought into operation under the direction of the State assemblies, or in concert with them, it may be apprehended that every measure would become the object of negotiation, of bargain and barter, much to the disadvantage of the system, as well as discredit to both governments. But Congress would look to the whole and make improvements to promote the welfare of the whole. It is the peculiar felicity of the proposed amendment that while it will enable the United States to accomplish every national object, the improvements made with that view will eminently promote the welfare of the individual States, who may also add such others as their own particular interests may require. The situation of the Cumberland road requires the particular and early attention of Congress. Being formed over very lofty mountains and in many instances over deep and wide streams, across which valuable bridges have been erected, which are sustained by stone walls, as are many other parts of the road, all these works are subject to decay, have decayed, and will decay rapidly unless timely and effectual measures are adopted to prevent it.