"It has been supposed in the past that rate-making is an exercise of judgment. It seems to be assumed by many that after a valuation has been made it will be merely an exercise in mathematics. Suppose the value of a railway for state purposes is $50,000,000. Then, on this theory, all that will have to be done will be to multiply this amount by 6 per cent.—or whatever may be regarded as a fair return—and so adjust the rates as to enable the road to earn, say, $3,000,000 a year," but, the writer goes on to ask, "how are the specific rates to be fixed? A great majority of those who advocate valuation say that they should be based on the cost of the service. The proper method, then, would be to ascertain the exact cost of hauling each commodity and then base rates on these ascertained costs, making them just high enough to allow the road a fair return." Then the article goes on to point out the difficulties of doing this, which of course we all know, and finally concludes that: "The theory of basing rates absolutely on the cost of service is unjust and impracticable." In the present state of the art this is probably true, but why is it necessary to change the present theory of rate-making because the rates are to be lowered or raised? If, for instance, it is shown that it is necessary to reduce the rates sufficiently so that the net earnings will be reduced, say, approximately 10%, is it beyond the capacity of the traffic officials of a railroad to adjust their rates accordingly? In an editorial in another part of this same issue the _Gazette_ advocates the raising of rates to meet higher prices of supplies and higher wages; it is surely as feasible to lower rates as it is to raise them, and, even though it were necessary to base rates on the cost of service, it does not seem as if that would be entirely impractical, inasmuch as it is the whole argument advanced for raising the commutation rates on the railroads entering New York City. Will the _Gazette_ say that the arguments put forward by these railroads are all wrong? Mr. Fink, in the article[24] already referred to, states: "It cannot be said that ... railroads make tariffs; they can only adjust them to varying conditions." * * * * * "Adjusting freight rates is practical work of men who have special training for it and large experience. They may not all be able to explain underlying principles, such as the value of service, but they have used this principle for years, and apply it, intuitively in every case which comes before them."