Oliver Wendell Holmes, Jr., Rowland v. Boyle — Opinion of the Court
“ We agree that it is proved that the local expenses are proportionally very much greater than the interstate. In fixing the exact rates it may be that mistakes were made. Perhaps the most important doubt is raised by the fact that the railroad apportioned the cost of maintaining tracks and track structures, so far as not definitely assignable, between freight and passenger service, on the basis of engine ton miles (the weight of the engine in working order, multiplied by the distance it moves in the one service or the other) . ”
