. Railway age gazette . he exact time required for the destruc-tive action to take place I cannot give, but in all essentials it wasa repetition of your experience. Now for the explanation. There was a brick arch in the fire-box that was hot when the fire was pulled. All of the heat thatit radiated, in cooling, was picked up by the air as it flowedgently into the tubes on its way to the stack. Of course, thisair was heated to a high temperature and contained the usual amount of free oxygen. I here was possibly some soot or oxideof iron in the interior of the tubes, or some places where thetube
. Railway age gazette . he exact time required for the destruc-tive action to take place I cannot give, but in all essentials it wasa repetition of your experience. Now for the explanation. There was a brick arch in the fire-box that was hot when the fire was pulled. All of the heat thatit radiated, in cooling, was picked up by the air as it flowedgently into the tubes on its way to the stack. Of course, thisair was heated to a high temperature and contained the usual amount of free oxygen. I here was possibly some soot or oxideof iron in the interior of the tubes, or some places where thetubes were c;uite bare. The high temperature of this oxygenenabled it to start an inmiediate attack en the exposed iron andset up a combustion of iron just as will occur in an oxygen course, you are aware of the high temperature that wouldresult from such a combination. But the products of the com-bustion of oxygen and iron are not gaseous as in the case ofcarbon and oxygen, but a solid, and so the heat generated by. Fig. 5—Condition of Tubes Just Back of Injector Checks the combustion was not lost by being carried away through thestack, but remained on the spot to add heat to that generatedand the closing of the stack only made a bad matter worse bychecking the draft and allowing only enough air to enter thetubes to keep up the fire, I am inclined to think that this is an explanation c f thephenomenon because the appearance of the tubes as they areshown in the photographs is so near like the appearance of thetubes of the first case cited that they could easily be passed oflfor the same. In that case there was no doubt of the oxygen-iron
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1913
