The smoke and flame, when they reach the end of the boiler, pass in this case through an iron flue or tube, reaching from end to end of the boiler; and on arriving at the front of the boiler, the smoke splits or separatesone half passing through a flue on the one side of the boiler, and the other half passing through a flue on the other side of the boilerboth of these flues having their debouch in the chimney.

He suddenly recalled that the guard at the blockhouse had been scattered along the shore to watch the debouch from the swamp.