* * * * * The switch-tender, whose momentary carelessness has many a time caused terrible disaster, but whose constant faithfulness outweighs a million-fold even that painful record, is one of the essential figures around a station. Nothing but eternal vigilance will suffice to keep switches always in safe position, and the conscientious custodian of these always possible death-traps often takes his burden of care to his pillow. The mishaps which do occur strikingly illustrate the practical impossibility of holding the human brain always to the highest pitch. A conductor in New Jersey (trainmen have to set switches at many places where no switchmen are employed) recently caused a slight collision by misplacing a switch, and on seeing the consequences exclaimed, "I deserve to be discharged; my mistake was inexcusable." And yet an honest man of that type is the kind demanded for such a place. The interlocking of switches and signals (the arrangement in a frame of the levers moving the switches and those moving signals in such a way that the signal which tells the engineer to come on _cannot be given_ until the switch is actually in proper position) is one of the notable improvements of the last twenty years, and is a great boon to switchmen, as well as to passengers and the owners of railroads.[36] By the aid of this apparatus and its distant signals, connected by wire ropes, the switchman's anxieties are reduced immeasurably. By concentrating the levers of a number of switches in a single room one man can do the work of several, and to the looker-on the perplexities of the position seem to have been increased instead of diminished. But the switchman's task now is of a different sort. Under the old plan he was constantly on guard lest he make a mistake and throw an engine or car off the track. Under the new, his calculations are chiefly about saving time and facilitating the work of the trainmen. Questions of danger rarely come up, being provided against by the perfection of the machinery. By long familiarity with the ground and the ways of handling the trains, the switch-tender in an "interlocking tower" is enabled to safely conduct a score of trains through a labyrinth of switches in the time that the novice would take to make the first move for a single train. Without this admirable apparatus, and skilful and experienced attendants, the business of great stations like the Grand Central at New York would be impossible in the space allowed. [Illustration: A Track-walker on a Stormy Night.] * * * * *