. The pictorial sketch-book of Pennsylvania, or, Its scenery, internal improvements, resources, and agriculture, populary described . P 0 R T R I C II M 0 N D . 37 ■which the railroad is prolonged into numerous lateral branches, sup-ported on strong tressel-works. The loaded cars are hauled to thewaters edge, where large apartments are erected for the storage ofthe coal. These apartments lie under the tressel-works, the bottomsof which descend, with a slight inclination, over the waters contents of the cars are discharged from the bottom, (being con-structed expressly for that purpose
. The pictorial sketch-book of Pennsylvania, or, Its scenery, internal improvements, resources, and agriculture, populary described . P 0 R T R I C II M 0 N D . 37 ■which the railroad is prolonged into numerous lateral branches, sup-ported on strong tressel-works. The loaded cars are hauled to thewaters edge, where large apartments are erected for the storage ofthe coal. These apartments lie under the tressel-works, the bottomsof which descend, with a slight inclination, over the waters contents of the cars are discharged from the bottom, (being con-structed expressly for that purpose,) and the coal falls directly intothe proper apartments below, assigned for the different sizes andqualities. A vessel, therefore, to be loaded, has merely to be drawnup to the wharf, under the projecting spout of the coal apartments,when a wicket is raised, and the coal issues out in one continuousstream. The operation of unloading the car, and of loading a vessel,is consequently very simple ; yet the contrivance, in its original con-ception, is one of great practical merit, saving annually, as it does, alarge amount of mon
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Keywords: ., bookcentury1800, bookdecade, booksubjectminesandmineralresources
