. The railroad and engineering journal . 68 THE RAILROAD AND [February, iSgo. inders separately, or of both at once. The air is admittedby a valve under the smol<e-box, shown at e, fig. 5. Cold-water pipes are provided, running to both sets of steam-chests, to prevent too great heating from the compressedair. of a tooth is avoided. Even should one break, the strainwill at once be taken up by the others, and bting distrib-uted over several, there will be no sudden shock to anyone tooth. With regard to the wear of the teeth upon the rack-rail {tlx120)-S0

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887