The Iowa Central, cutting across the four main lines between Chicago and Omaha, derives a large revenue from such diversion. Coal from Peoria west, instead of moving by the shortest line to Omaha, is hauled across the first three to a connection with the devious Great Western line.[300] The motive is obvious. A fourth cause of diversion of traffic has to do rather with the operating than the traffic department. An inequality of tonnage in opposite directions may make it expedient to solicit business for the sake of a back load. The Canadian Pacific may engage in San Francisco-Omaha business by way of Winnipeg, because of the scarcity of tonnage east bound. The traffic to and from the southeastern states is quite uneven in volume. The preponderance of bulky freight is north bound to the New England centres of cotton and other manufacture; while from the western cities, the greater volume of traffic is south bound, consisting of agricultural staples and food stuffs. To equalize this traffic it may often be desirable to secure the most roundabout business. A disturbing element of this sort in the southern field has always to be reckoned with. A good illustration elsewhere occurs in the well known St. Cloud case.[301] The Northern Pacific accepted tonnage for a most circuitous haul to Duluth, but seems to have done so largely in order to provide lading for a preponderance of "empties." In this case it did not lower the normal rate but accepted it for a much longer haul. Not unlike the preceding cause, also, is a fifth, the desire to be in position to interchange traffic on terms of equality with powerful connections. Mr. Bowes, traffic manager of the Illinois Central, justifying the participation of this road in Chicago-San Francisco business by way of New Orleans, well stated it as follows:[302] "Of course the Southern Pacific Railroad, as you gentlemen know, originate and control a very large traffic, which they can deliver at various junctions; at New Orleans, where they have their long haul to the Missouri river, and we naturally want some of that business, a long haul traffic to New Orleans, and in giving it to them we place them under obligations to reciprocate and give us some traffic. That is one of the things that occurs to a railroad man as to increasing the volume and value of his traffic for the benefit of his company."