admitted the’firm of ‘Rose, Robbins & Co.’ are engaged in' the selling of paper, writing materials, ■ and such articles as are used in tlie book stores of the Taxing District of Shelby County, and that it was a line of such articles for the sale of which the said defendant herein was drumming at the time of his arrest.”'
This was all the evidence, and thereupon the court rendered judgment against 'the defendant, to which he excepted," and a bill of exceptions was taken.-
The principal question argued before the Supreme Court of Tennessee was, as to the constitutionality of the act which imposed the tax on drummers; and the court decided that it was constitutional and valid.
That is the question before us, and it is one - of great importance to the people of the United States, both as it respects their business interests and their constitutional rights. ,It is presented in a nutshell, and does not, at this day; require for its solution any great elaboration of argument or review of authorities. Certain principles have been already established by the decisions of this court -which will conduct us to a satisfactory decision. Among those principles are the following:
'1. The Constitution of the United States having given to Congress the power to regulate commerce, not only with foreign nations, but among the several states, that power is necessarily exclusive whenever the subjects of it are national in their character, or admit only of one uniform system, or plan of regulation. This was decided in the case of Cooley v. Board of Wardens of the Port of Philadelphia, 12 How. 299, 319, and was virtually involved in the case of Gibbons v. Ogden, 9 Wheat. 1, and has been confirmed in many subsequent cases, amongst others, in Brown v. Maryland, 12 Wheat. 419; The Passenger Cases, 7 How. 283; Crandall v. Nevada, 6 Wall. 85, 42; Ward v. Maryland, 12 Wall. 418, 430; State Freight Tax Cases; 15 Wall. 232, 279; Henderson v. Mayor of New York, 92 U. S. 259, 272; Railroad, Co. v. Husen, 95 U. S. 465, 469.; Mobile v. Kimball, 102 U. S. 691, 697; Gloucester Ferry Co. v. Pennsylvania, 114 U. S. 196, 203; Wabash, &c., Railway Co. v. Illinois, 118 U. S. 557.