. The science of railways . Fig. 84. CRUSHED STONE, 2 INCHES DIAMETER OX QUARRY SPAULS 4 TO 6 INCHE DIAMETER.—N. Y. C. & H. R. R. R. STANDARDS OF CONSTRUCTION. 157 ^..^■it~. <<•-«--

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1900