dimensions. Scientific construction and excellent material caused the metallic framework to be relatively light; while the upper portion was almost entirely constructed of ualin,—a material specially adapted for such purposes from its strength, lightness, and durability.
The wonderful smoothness of the motion was largely due to the peculiar construction and arrangement of the wheels. These ran four abreast, the inner pair on a track somewhat lower than the broad metallic plates on which the outer pair ran. Derailment was thus rendered impossible. Collision from behind was obviated by means of an automatic telegraph, which kept the engineer exactly informed of the distance ahead of the preceding train. Of other ingenious contrivances for the prevention of accident I will say nothing, lest I become tedious; nor will I mention the speed attained, lest I should be accused of exaggeration.
