. Review of reviews and world's work. A VIEW OF THE CITY OE PITTSBURG IN 1817, —FROM AN OLD PRINT. (The Forks of the Ohio was taken by a force of French and Indians in 1754, and held under the name of Fort Duquesneuntil 1758, when the place was taken by General Forbes, and named Fort Pitt, or Pittsburg.) PITTSBURG—A NEIV GREAT CITY. 51. A viKw iiF iTrrsmiui in (The MonoDKahela Kivi-r to tlit- ri^lit; Alli-^lu-iiy Itivi-r to the U-ft. la-yond covered briildfe.) cellonce, was originally mined and transportedentirely by human labor. The output was there-fore small. Later
. Review of reviews and world's work. A VIEW OF THE CITY OE PITTSBURG IN 1817, —FROM AN OLD PRINT. (The Forks of the Ohio was taken by a force of French and Indians in 1754, and held under the name of Fort Duquesneuntil 1758, when the place was taken by General Forbes, and named Fort Pitt, or Pittsburg.) PITTSBURG—A NEIV GREAT CITY. 51. A viKw iiF iTrrsmiui in (The MonoDKahela Kivi-r to tlit- ri^lit; Alli-^lu-iiy Itivi-r to the U-ft. la-yond covered briildfe.) cellonce, was originally mined and transportedentirely by human labor. The output was there-fore small. Later, horses, mules, and engineswere used for handling the coal, but the minerswere compelled to excavate by hand, aided byblasting with gunpowder, the prevailing methodof mining being known as the room-and pillarsystem. Recently, electricity has been successfully ap-plied to undercutting the coal, t<i hoisting, transportation, and lighting, so that a single minecan ship over four thousand tons per day. andthe whole district yields about thirty-six mil-lion tons yearly, or more than the entire out-put of France, and sufiicient to supply about fivepounds of coal to every man, woman, and childin the world. Mechanical power multiplies lal)orers, andmachines multiply brains. The entire workingpopulation of the Inited States could not
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1890
