 At this point a vertical shaft descends to an additional depth of nearly 300 feet, over which is placed a steam " whim " with friction gearing and wire rope, worked by a steam engine, and by means of which all the ore from the various workings of the...  American Journal of Pharmacy - Página 5181864Vista completa - Acerca de este libro
 | 1864 - 968 páginas
...employed in working the mine. At this point a vertical shaft descends to an additional depth of nearly 300 feet, over which is placed a steam " whim " with friction...the mine is the liberal scale of its exploration. Every thing indicates a liberal and judicious use of capital in the development of a property which... | |
 | 1864 - 474 páginas
...employed in working the mine. At this point a vertical shaft descends to an additional depth of nearly 300 feet, over which is placed a steam " whim " with friction...the mine is the liberal scale of its exploration. Every thing indicates a liberal and judicious use of capital in the development of a property which... | |
 | 1864 - 496 páginas
...employed in working the mine. At this point a vertical shaft descends to an additional depth of nearly 800 feet, over which is placed a steam " whim " with friction...gearing and wire rope, worked by a steam engine, and by meaus of which all the ore from the various workings of the mine is conveniently discharged from the... | |
 | John Ross Browne, James Wickes Taylor - 1867 - 374 páginas
...over which is placed a steam " »him" with friction gearing and wire rope, worked by a steam-engine, and by means of which all the ore from the various...convey it out of the level to the dressing floors. ***** In order to reach the lower workings of the mine, the observer may employ the bucket as a means... | |
 | United States. Department of the Treasury, John Ross Browne - 1867 - 326 páginas
...working the mine. At this point a vertical shaft descends to an additional depth of nearly three hundred feet, over which is placed a steam " whim" with friction gearing and wire rope, worked by a steam-engine, and by means of which all the ore from the various workings of the mine is conveniently... | |
 | United States. Congress. House - 1867 - 780 páginas
...working the mine. At this point a vertical shaft descends to an additional depth of nearly three hundred feet, over which is placed a steam " whim" with friction gearing and wire rope, worked by a steam-engine, and by means of which all the ore from the various workings of the mine is conveniently... | |
 | 1864 - 574 páginas
...employed in working the mine. At this point a vertical shaft descends to an additional depth of nearly 800 feet, over which is placed a steam " whim " with friction...the cars, which convey it out of the level to the dressmg floors. The first thing which strikes the observer on entering the mine is the liberal scale... | |
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