. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . THE WALLACE SMOKE STACK. great expense and incurring no end oftrouble to introduce superheaters andother appliances calculated to savesteam; and they keep wasting it throughs;[tcty valves because the air brake ex-liaust steam is constantly stimulating. PLAN OF WALLACE STACK. the generation of steam at times whenno care should be spared to keep itdown. We make a stand in favor ofthis small improvement that will pro-duce important savings.

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901