The Mercury (1938)

"Mercury was the name used by the New York Central Railroad for a family of daytime streamliner passenger trains operating between midwestern cities. The Mercury train sets were designed by the noted industrial designer Henry Dreyfuss, and are considered a prime example of Art Deco design...

For the Mercury, he achieved a streamlined appearance by covering the exterior pipes, whistles, and other fittings in a smooth "bathtub" cowl. The sides of the cowl were cut away to show the driving wheels..."

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