tends from the front of the furnace to the bridge EDUCATIONAL DEPARTMENT. wall. See Fig. 4. The bottom of the door frame extends back a little way and drops down, forming a kind of HELPS FOR CANDIDATES FOR MARINE EN¬ shelf for the support of the front ends of the grate bars. GINEERS’ LICENSES—… … iron forming the inner wall. This is pierced with a large number of small holes, while the frame is pro¬ fired, so as to provide for the gradual distillation and vided with a smaller number of larger holes. These are combustion of its gases. provided for the purpose of admitting air to the furnace…
Shipbuilding -- Periodicals · Shipbuilding industry -- Periodicals
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