In two early cases, where the statute was invoked to enjoin a transportation rate agreement between interstate railroad companies, it was held that it was no defense to show that the agreement as to rates complained of was reasonable at common law, because it was said that the statute was directed against all contracts and combinations in restraint of trade whether reasonable at common law or not. It was plain from the record, however, that the contracts complained of in those cases would not have been deemed reasonable at common law. In subsequent cases the court said that the statute should be given a reasonable construction and refused to include within its inhibition, certain contractual restraints of trade which it denominated as incidental or as indirect. These cases of restraint of trade that the court excepted from the operation of the statute were instances which, at common law, would have been called reasonable. In the Standard Oil and Tobacco cases, therefore, the court merely adopted the tests of the common law, and in defining exceptions to the literal application of the statute, only substituted for the test of being incidental or indirect, that of being reasonable, and this, without varying in the slightest the actual scope and effect of the statute. In other words, all the cases under the statute which have now been decided would have been decided the same way if the court had originally accepted in its construction the rule at common law. It has been said that the court, by introducing into the construction of the statute common-law distinctions, has emasculated it. This is obviously untrue. By its judgment every contract and combination in restraint of interstate trade made with the purpose or necessary effect of controlling prices by stifling competition, or of establishing in whole or in part a monopoly of such trade, is condemned by the statute. The most extreme critics can not instance a case that ought to be condemned under the statute which is not brought within its terms as thus construed. The suggestion is also made that the Supreme Court by its decision in the last two cases has committed to the court the undefined and unlimited discretion to determine whether a case of restraint of trade is within the terms of the statute. This is wholly untrue. A reasonable restraint of trade at common law is well understood and is clearly defined. It does not rest in the discretion of the court. It must be limited to accomplish the purpose of a lawful main contract to which, in order that it shall be enforceable at all, it must be incidental. If it exceed the needs of that contract, it is void.