ng station, of which we give an exterior| tions. Thefly wheel journal is nearly on a line with the The low duty engines are used when a heavy rain and interior view, is a fine structure. It is built of] lower heads of the steam cylinders. The leading sends a large volume of drainage to the station.… … scraper. Both are illustrated. The chain feeder, con- the slip of the pumps reduces to 2°5 BOSTON DRAINAGE SYSTEM—PUMPING STATION BUILDING. structed on the principle of a chain pump or grain percent. A portion of the steam was elevator, draws the material along to the mouth of used to drive the…
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