will send his goods north or east perhaps; but only in the few cases where two lines run to the same point does he really have the choice of two rates for getting his produce to market. Practically, then, there are not, and never can be, more than a few hundred places in the country where shippers will be able to choose different routes for sending their goods to market. We say there never can be, because the building of a line of railway to parallel an existing line able to carry all the traffic is an absolute loss to the world of the capital spent in its construction, and a constant drain after it is built in the cost of its operation. This fact is now, fortunately, generally appreciated.
But what of the competitive traffic which exists between commercial centres, like the trunk-line traffic between Chicago and the cities on the seaboard, or between the former city and the collecting centres farther west like St. Paul, Omaha, and Kansas City? Here, indeed, there is competition; and it is of great importance because of the enormous bulk of the traffic which traverses these few routes.
It is a peculiar feature of the railway business which we have now to consider, and one which is not generally understood. We have already perceived the principle that competition cannot permanently exceed a certain intensity; and the proof of this principle in the case of the railway is remarkably plain. Suppose two roads are competing for the traffic between Omaha and Chicago. A shipper at the former city who wishes to send a few tons of freight to Chicago may go to one company and ask their rates, then to the other and induce them to give him a lower rate, and then back to the first again, until he secures rates low enough to suit him. Now it is a fact that either company can afford to carry this especial freight for less than the actual cost of carrying it better than it can afford to lose the shipment. This is because it costs the company practically no more to carry the goods than if they were not shipped by its line; and hence whatever is received for the freight is so much profit. Stated in the form of a principle, this fact is expressed thus: *Receipts from additional