he air under the grates to the combustion chamber, G. field?” has been answered. I think it has not. It was clearly buck and Westfield boilers, I think this shows why the for- D is the perforated plate across from wallto wall, having shown that the boiler was defective when it first left the mer… … weighted so as to enable youto draft) of thirty per cent over CONSTRUCTIUN OF BOILER FURNACES. get upa pressure nearly equal to the ordinary furnaces where air the strength of the boiler. Give the boiler a good supply of nine years ill usage, notwithstanding Mr. John K. Matthews is not admitted.…
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