As each newly discovered scientific principle is taken advantage of in the practical world, new legal problems arise around it. One way or another it is eventually taken care of by the expansion of the legal system to embrace the new situation. The discovery of radio transmission is an example made striking by the extraordinary speed with which it has become a part of the people's daily life and the conflicts of interest that are peculiar to it. The law found itself relieved of many of the embarrassments in dealing with the problem by the fact that Congress early undertook to regulate the use of the wave lengths. It has more recently, by the Radio Act of 1927, undertaken to regulate the entire field of radio communication and broadcasting. The question then arises as to the power of Congress to enact such regulation. It is on the existence of such a power that the whole question of the future development of radio law fundamentally depends.