James Clark McReynolds,
Union Tank Line v. Wright — Dissent
“ But, even assuming that such a basis could be adopted without in effect regulating interstate commerce by varying the burden of taxation in direct proportion to the volume of such commerce, it still is obvious that a valuation according to aggregate car mileage would virtually ignore the particular value due to the relation of the cars to the rail system, would in effect be equivalent to a valuation according to average use, and would be open to the same objection, viz., that its ascertainment would lie wholly within the breast of the taxpayer. ”
