It may be well to explain, at this point, that the regular freight-trains on every road are usually run in sections, the number of sections depending upon the amount of freight to be moved. For instance, if, toward the middle of the afternoon, there has accumulated in the yards at Wadsworth only enough west-bound freight for a single train, the cars are made up, and at seven o'clock, immediately following the accommodation, regular west-bound freight-train No. 97 is started toward Cincinnati, and runs as nearly as possible on the schedule given it in the time-table. If, however, there are too many cars for one engine to handle, they are made up into two trains, and the first one that goes out is called the first section, and displays at the front of the engine two green lights to show that another section is following. Ten minutes later, the second section is sent out, displaying no signals. Theoretically, both sections constitute one train, and the track cannot be used by any other train until both get by; but this is a theory which is constantly broken in practice. Sometimes, when freight business is heavy--in the fall, for instance, when the grain crops are being moved and the merchants throughout the country are laying in their supplies for the holidays--there will be three or four sections of each of the regular freight-trains. But while this system allows for a certain expansion of traffic to suit the road's business, by far the greater part of the freight in the busy season is handled by "extras"--that is, by trains which have no place on the time-card and no regular schedules, but which must run from station to station, whenever the track happens to be clear. For instance, as soon as Number Two, the east-bound flyer, pulls into the yards at Wadsworth, an extra west-bound freight will be started out, with orders to run extra to the end of the division. The conductor is armed with the time-card, and must keep out of the way of all trains which appear on it. He is also provided with meeting orders for all the other extras which happen to be going over the road at the same time, and must take care to comply with them. As he goes from station to station, he is kept informed as to whether any of the regular trains are behind time, so that he need not wait on any of them unnecessarily, but may get over the road as rapidly as possible. The actual conduct of the train is left largely to him and to the engineer, so that their responsibility is no light one.