Dr. Howe asserts that the monopolistic character of such public utility corporations as street railways and telephone companies is due to their occupation of "favoured sites."[52] How can this be true, when it is possible to build a competing line on an adjoining and parallel street? If the city forbids this, and gives an exclusive franchise to one company, this legal ordinance, and not any exceptional advantage in the nature of the land occupied, is the specific cause of the monopoly. If the city permits a competing line, and if the two lines sooner or later enter into a combination, the true source and explanation are to be found in the fact of increasing returns. Combination is immeasurably more profitable than cut-throat competition. Moreover, the evils of public service monopolies can be remedied through public control of charges and through taxation. Neither in railroads nor in public utilities is land an impelling cause of monopoly, or a serious hindrance to proper regulation. Most of Dr. Howe's exaggerations of the influence of land upon monopoly take the form of suggestion rather than of specific and direct statement. When he attempts in precise language to enumerate the leading sources of monopoly, he mentions four; namely, land, railways, the tariff, and public service franchises.[53] Nor is he able to prove his assertion that of these the most important is land. Nevertheless, land is one of the foremost causes. The most prominent examples of land monopoly in this country are the anthracite coal mines and the iron ore beds. Fully ninety per cent. of our anthracite coal supply (exclusive of Alaska) is under the control of eight railway systems which in this matter act as a unit.[54] According to Dr. Howe, the excessive profits reaped from this monopolistic control amount to between one hundred and two hundred million dollars annually.[55] In other words, the consumers of anthracite coal must pay every year that much more than they would have expended if the supply had not been monopolised. On the other hand, the formation of monopoly would have been much more difficult if the railroads had been legally forbidden to own coal mines. As things stand, railway monopoly is an important cause of the anthracite coal monopoly. Some authorities are of the opinion that a similar condition of monopoly will ultimately prevail in the bituminous coal mines. Iron ore has been brought under the control of the United States Steel Corporation to such an extent that the Commissioner of Corporations writes: "Indeed, so far as the Steel Corporation's position in the entire iron and steel industry is of a monopolistic character, it is chiefly through its control of ore holdings and the transportation of ore."[56] From this statement, however, it is evident that the monopoly depends upon control of transportation as well as upon ownership of the ore beds. If the former were properly regulated by