. The science of railways . Fig. 120. RIGID FILLED FROG. frog. These frogs are made in two styles; in oneof them the metal between the rails is in twopieces, and the other two pieces where they cometogether at the point of the frog are welded to-gether, thus making a stiffer frog and givingmore support to the point. Fig. 121 representsa chuck filled frog which is lighter than the filled 228 BUILDING AND REPAIRING sscrmir CJ> sktwmAB Fig. 121. RIGID CHUCK FILLED FROG. frog and suitable for yards or a road with lighttraffic. Fig. 122 represents a clamped frog, the

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1900