Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 447
engine,also projects a powerful vertical beam. The verticalbeam makes a very decided illumination in theheavens, so much so that it is possible not onlyto detect the presence of an engine, but also in manycases to follow its path and determine in which way 440 LOCOMOTIVE ENGINEERING it is heading.… … Figure 216Front View Showing Shade Drawn be unaware of their location. The horizontal ray oflight projected in front of the engine, highly illumi-nates the track and right of way for a distance ofhalf a mile to a mile ahead of the train. Among theobjections that have been raised to the use of…
Locomotives
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