Still other powers of the federal government, which have so grown beyond their first proportions as to have marred very seriously the symmetry of the "literary theory" of our federal system, have strengthened under the shadow of the jurisdiction of Congress over commerce and the maintenance of the postal service. For instance, the Supreme Court of the United States has declared that the powers granted to Congress by the Constitution to regulate commerce and to establish post-offices and post-roads "keep pace with the progress of the country and adapt themselves to new developments of times and circumstances. They extend from the horse with its rider to the stage-coach, from the sailing vessel to the steamer, from the coach and the steamer to the railroad, and from the railroad to the telegraph, as these new agencies are successively brought into use to meet the demands of increasing population and wealth. They are intended for the government of the business to which they relate, at all times and under all circumstances. As they were intrusted to the general government for the good of the nation, it is not only the right but the duty of Congress to see to it that the intercourse between the States and the transmission of intelligence are not obstructed or unnecessarily encumbered by state legislation."[10] This emphatic decision was intended to sustain the right of a telegraph company chartered by one State to run its line along all post-roads in other States, without the consent of those States, and even against their will; but it is manifest that many other corporate companies might, under the sanction of this broad opinion, claim similar privileges in despite of state resistance, and that such decisions go far towards making state powers of incorporation of little worth as compared with federal powers of control.