incorrectly . The plates exposed to the immediate action of the flame should be of the best description , more especially in the crowns of the furnaces , where they must run lengthways , and all the joints kept well out of the fire . Sometimes the furnaces are plated with butt joints and strips ;… … Fig . 43 . — Plate - stays . end , and outside of the flue - plates at the extreme end ; but should the furnace be underneath the boiler the flues must be joined to the end - plates with angle - iron outside of the flues , or , in other words , inside of the shell . The water space underneath the…
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