. The railroad and engineering journal . theboiler are air-spaces which serve a double purpose, bothpreventing any possible loss of heat and providing chan-nels through which a secondary supply of heated air canbe thrown into the chamber. At the lower side the com-bustion chamber is provided with a door or man-hole, bywhich ashes carried over from the fire-box can be re- Vol. LXIV, No. 5.] ENGINEERING JOURNAL. 221 moved, and which also serves to make the tubes accessi-ble for inspection and repairs. In the forward part of the tubular lire-box there is afire-brick bridge held in place by two ir
. The railroad and engineering journal . theboiler are air-spaces which serve a double purpose, bothpreventing any possible loss of heat and providing chan-nels through which a secondary supply of heated air canbe thrown into the chamber. At the lower side the com-bustion chamber is provided with a door or man-hole, bywhich ashes carried over from the fire-box can be re- Vol. LXIV, No. 5.] ENGINEERING JOURNAL. 221 moved, and which also serves to make the tubes accessi-ble for inspection and repairs. In the forward part of the tubular lire-box there is afire-brick bridge held in place by two iron stay-rods pass-ing through it, as shown in section in fig. I. The grateis back of this bridge, and is nearly in the center of the bustion attained by the use of the combustion chamberand the secondary air supply. These considerations, with the fact that the experimentsof Herr Verderber on the Hungarian State Railroad hadproved that a fire-box lined with fire-brick can be usedwithout reducing the steaming qualities of a boiler, led to. 1 ■•s — « —ids^ a— ^— /«« -1^—I ^ /yst ^^^3^i - /•,,.2.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
