[97] In a case of the kind referred to, which was brought before the Board of Trade when the Bill was before Parliament, as a skilled officer of the company was occupied 150 hours, in preparing the information alone to reply to the Board of Trade, irrespective of the time occupied by others in analysing the information, and in corresponding with the Board of Trade on the subject, all of which had no practical result. When we are invited to place in the hands of a tribunal the control of the rates, it is expedient to note the difficulties which the Railway Commissioners seem to have felt in dealing with the various questions raised before them, and the manner in which they have dealt with them. In determining under the Traffic Act questions of alleged undue preference, they have been obliged to express their opinion on the reasonableness of particular rates. As to the legal correctness of their decisions, nothing need here be said; for the present purpose it may be assumed that they are open to no legal exception, and we fully recognise the ability and care which they manifest. Only their economical effects are here considered. There would be no difficulty in showing that they have acted upon principles, so far as they have acted upon any, which have not merely not been sanctioned, but have been condemned, by every Royal Commission or Select Committee which has inquired into the subject, and by almost every economist of eminence. On the part of the Commissioners there have been--not unnaturally--some waverings in opinion. But on the whole, they appear to have attempted to frame rates according to cost of service; and they appear not to admit that the existence of competition is a reason for varying them. Now, in the first place they apply--it may be added, necessarily apply--the cost of service principle in an imperfect fashion. They deal only with undue preference in regard to the same or very similar articles. They do not say, what consistent adherence to the theory would compel them to say, that a ton of coals and a ton of tin ingots must be carried at much the same rate; they are bound by the existing classification, which forbids this. Occasionally their decisions are indeed curiously inconsistent in many respects, as was probably inevitable, where they were called upon to face the commercial results which would have followed a too rigid adherence to some of the principles by which they felt themselves bound.[98] In the case of the _Nitshill and Lesmahagow Coal Company_ v. _Caledonian Railway Company_,[99] the defendant company claimed to charge more for carrying cannel coal, which, it was alleged, cost 38s. a ton, than they charged for carrying splint, which cost 15s. 6d. On the principle on which the classifications in most special Acts were framed, this would be reasonable; the more valuable article could bear more, and ought to pay more. But the Railway Commissioners decided differently. “As the quality of coal does not