. The science of railways . (viiODlE ordinate rN lOfT* O^-+Ji . 30- « Z^ f^ Fig. 232. SINGLE THROW SPLIT SWITCH Ko. iVo; SPRING RAIL FROG 15 FEET Fig. 233. SINGLE THROW SPLIT SWITCH No. 9; SPRING RAIL FROG 15FEET LONG. •y- — .5 O- - —r I ^> 77^ -f-= f 115 6- Fig. 234. SINGLE THROW SPLIT SWITCH No. 10; SPRING RAIL FROG 15 FEET LONG. CONSTRUCTING TRACK, 311

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1900