amount of smoke discharged from the later introduced for the same purpose, which dispensed considerable portion of its journey from the boiler with the magnet, and is the prevailing style at this chimneys, added to which is the waste of fuel accom- front to the bridge wall is mostly confined… … O'DONNELL'S ENVELOPE AND WRAPPER. That the combustion is actually improved by this velope or wrapper, and at the central point of the flap, smoke consumption is proved by the fact that the where the two extension flaps meet, the flap is bent outward, a small portion at that place being left un-…
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