The use of the industrial railroad as a means of preferential treatment still occasions difficulty.[195] The case is simple where but one shipper makes use of the terminal plant; but where a number of shippers may utilize it jointly, it becomes difficult to draw the line between pro-rating allowances and actual rebates. The Manufacturers' Railroad Company, with twenty miles of track, four locomotives and one hundred and ten employees, serves a considerable manufacturing section in South St. Louis. A majority of the stock of this terminal railroad is held by persons controlling the Anheuser-Busch Brewery. The enormous traffic of this concern, equal to about one-thirtieth of the total tonnage of St. Louis, is handled over the line of the Manufacturers' Railway. Almost nine-tenths of its business consists of shipments of beer; but in 1910 some 5,424 carloads belonging to other patrons moved over its rails. For this terminal service the Anheuser-Busch Company, through the Manufacturers' Railway, got a very substantial allowance for the service rendered. For example, in one month on ten carloads of beer, the Louisville & Nashville allowed $45 out of a total revenue of $391.60 for moving the traffic something less than four thousand feet. The disparity is obvious between this allowance and the balance remaining as compensation for moving the traffic 477 miles, including three first-class railroad tolls and terminal charges at the other end.[196] A prime difficulty is to determine whether unduly low commodity rates amount practically to special favors granted to large shippers. Much evidence recently tends to show that the trusts enjoy advantages of this sort not extended to other competitors. The Steel Corporation, through its ownership of railroads and steamships, certainly has a great advantage over its rivals.[197] But other trusts not controlling common carriers of their own, are also accorded what seem to be unduly low rates upon their products. Recent evidence before the Interstate Commerce Commission seems to show that sugar, beef, and coffee do not bear their proper share of transportation costs.[198] Copper, the product of a powerful trust, enjoys a lower ton mile rate than grain,--a rate, despite its high intrinsic value, actually below that on soft coal.[199] The discrimination is too palpable to be passed over without explanation.