ted of such a magni-tude, form, and depth, as to admit a current of atmospheric air tothe grate-bars, sufficient to sustain the combustion. The formof the ash-pit is usually wide below, contracting towards the top. 11 THE STEAM ENGINE. The fuel, when introduced at the fire-door a, should be laid… … being carried by a current of air admitted through small apertures-in the fire-door over the burning fuel in the hinder part of thegrate, they are burnt. When the fuel in front of the grate hasbeen thus coked, it is pushed back, and a fresh feed introduced infront. The coal thus pushed back soon…
Steam-engines · Steam-navigation · Locomotives
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