made by the authorities in eliminating the causes of these accidents and in improving the conditions has so far been very insignificant. There seems to be an inclination in all quarters to let things run their natural course, and to wait for the time when these accidents shall have become mechanically impossible.
But the writer of this book has very different ideas on the subject. He has studied the actual results that have been obtained from these block-signal systems, and at the same time he has paid particular attention to the behavior and responsibility of the men in regard to these accidents. The study referred to has not been a matter of a month or two, but of many years. For unknown reasons some of my critics have seen fit to question the nature of my experience as a railroad man. Fortunately it is an easy matter to give an account of my qualifications. The mere fact that one has had a varied and lifelong experience as an engineman or a conductor would be only partially significant. But a man who has been a telegraph operator and towerman for twenty-seven years and part of the time chief clerk to a railroad superintendent has certainly some claims to an all-round knowledge of his subject. The extent of the territory covered by this experience is even wider than one would suppose. For a telegraph operator is, of necessity,
