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The fame of the De Glehn Balanced Compound engine having reached America, the Pennsylvania Railroad ordered one from the French builders, and this is the one that was exhibited at the St. Louis Exposition.
The American purchasers specified that it should be exactly similar in design to the other engines of the De Glehn type running on the French lines, except heavier, as American express passenger equipment is much heavier than the European, and a few minor changes in detail were necessary in order to “make it fit” American-tracks, and go where our engines will go. In spite of the fact, however, that this engine was built more heavy and powerful than the ones built for the French railways, it is hardly large enough to handle the very heavy passenger trains of the Pennsylvania lines, but with its proper load, with the lighter, but fast, service on certain divisions, it has been, and is, giving most excellent results; and the principle upon which the De Glehn engine is “balanced” is now being used with success by the Baldwin Locomotive Works in their Vauclain FourCylinder, Balanced Compound, and the Cole Balanced Compound engine built by the American Locomotive Works.
Fig. 17 represents the Walschaert gear that delivers the motion to the valves of the high-pressure cylinders