. The science of railways . Fig. 236. THREE THROW SPLIT SWITCH WITH No. 7; RIGID FROG 7 FEET Fig. 237. THREE THROW SPLIT SWITCH WITH No. 7\ RIGID FROG 12 FEET LONG. 312 BUILDING AND REPAIRING RAILWAYS.

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1900