In nothing is the want of unity so distinctly and mischievously obvious as in the power of each corporation to make rates independently. It may not only make its own local rates at discretion, but it may join or refuse to join with others in making through rates; so that an inconsiderable and otherwise insignificant road may be capable of being so used as to throw rates for a large section of the country into confusion, and to render the making of profit by other roads impossible. It is frequently said in railroad circles that roads are sometimes constructed for no other reason than because, through this power of mischief, it will be possible to levy contributions upon others, or to compel others, in self-protection, to buy them up at extravagant prices. Cases are named in which this sort of scheming is supposed to have succeeded, and others in which it is now being tried. Evils springing from the diversities mentioned have been cured, or greatly mitigated, by such devices as the formation of fast-freight lines to operate over many roads; by allowing express companies to come upon the roads with semi-independence in the transportation of articles, where, for special reasons, the public is content to pay an extra price for extra care or speed; and by arrangements with sleeping-car companies for special accommodations in luxurious cars to those desiring them. These collateral arrangements, however, have not been wholly beneficial; and had all the roads been constructed as parts of one system and under one management, some of them would neither have been necessary nor defensible. They exist now, however, with more or less reason for their existence; and they tend to increase the diversities in railroad work.