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Scientific American, Vol. 73, No. 13 (September 1895) (1895)
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ing trough in the West Mahanoy district, Schuylkill County, and Pennsylvania, while mines yielding bituminous coal is one of the mines of the system of the "Philadelphia by lifting a shutter, when a new charge is taken into are pretty well scattered over the country. But few the picking box from… … Fig. 1.-CLEABIN0 THE LTTUP COAL FSOM THE HOISTING SHUTE. Fig. 8.-ASS0BTING COAL-PICKING OUT SLATE. PENNSYLVANIA COAL MINING—BOYS PICKING COAL AT THE BAST COLLIEEY.-Fig. 2. © 1895 SCIENTIFIC AMERICAN, INC.Inches · Phororhacos · Illustrated · Munn · Scientific American · Edition · Express money · Coloring matter · Coupling bar · Perspective elevation · Thirty years · Gas engine · Perspective elevations · Sailing vessel · Building edition
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