scale in a boiler, by a circulation of the water during was impure, the interior of the boiler was clean and the process of steam generation, and the utilization connecting the exterior and interior water spaces; free from scale. of a large amount of the heat, are objects worthy Those conversant… … pressure causing this bend* bolts, which, being in the water CONNERY & PENNYPACKER'S STEAM BOILER ing action to be continually space, are protected from fire, going on when the boiler is at work. By this action tion of the heat, caused by the ample size of the and the joint can therefore be readily…
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