Steel Rails.--Their Strength and Economy.

다국어 초록 (Multilingual Abstract)

On the main lines, where the traffic is heavy and fast, the adoption of steel rails is only a question of time. Of this there can be no doubt. A well made steel rail has at least tenfold greater durability than iron, and nearly double greater stiffness and strength for the same section of metal, and therefore much safer. Upon lines through sparsely settled sections of the country, and upon branch or spur lines of small traffic, iron may be continued in use perhaps without detriment in an economical sense; but as fast as the traffic is developed to any considerable amount steel must of necessity take the place of iron.