A Treatise on Practical and Theoretical Mine VentilationJ. Wiley & Sons, 1884 - 141 pages |
From inside the book
Results 1-5 of 35
Page 6
... reason of the fatal nature of after - damp of explo- sions in coal - mines . Its specific gravity is 1.524 ; so that it is a little more than one and a half times as heavy as air . It lodges near the floor of places in which it is ...
... reason of the fatal nature of after - damp of explo- sions in coal - mines . Its specific gravity is 1.524 ; so that it is a little more than one and a half times as heavy as air . It lodges near the floor of places in which it is ...
Page 17
... reason that fire - damp is in the form of an explo- sive mixture in holes in the top , is because it is fed more quickly from above than it is able to diffuse ; the ventilating current not affecting it to a very great extent . 18 MINE ...
... reason that fire - damp is in the form of an explo- sive mixture in holes in the top , is because it is fed more quickly from above than it is able to diffuse ; the ventilating current not affecting it to a very great extent . 18 MINE ...
Page 28
... reason , furnaces should not be used in shallow pits . When coal is worked at a dip , the effect of natural ventilation is very complicated ; and in many instances there will be little benefit derived therefrom at any season of the year ...
... reason , furnaces should not be used in shallow pits . When coal is worked at a dip , the effect of natural ventilation is very complicated ; and in many instances there will be little benefit derived therefrom at any season of the year ...
Page 49
... reason why it should be rejected , until the experiments already referred to approach more nearly to each other in their results . The co- efficients in practice can never be the same in different mines ; but they may approach each ...
... reason why it should be rejected , until the experiments already referred to approach more nearly to each other in their results . The co- efficients in practice can never be the same in different mines ; but they may approach each ...
Page 89
... reason of the nature of the coal- seam and the mode of working , the tonnage hewn by each man may be different , and only require sixty men in the first mine , whilst the second requires a hundred and fifty men . × The first , we will ...
... reason of the nature of the coal- seam and the mode of working , the tonnage hewn by each man may be different , and only require sixty men in the first mine , whilst the second requires a hundred and fifty men . × The first , we will ...
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Common terms and phrases
acres Act of Congress action adverse claim affidavit air passing air-column airway amicus curiæ amount anemometer application asphyxia barometer brattice circulation co-efficient Copp's Copp's Min court cubic feet cubic foot district ditch easements entry feet of air feet per minute filed fire-damp friction furnace held horse-power hundred inches issue ksv2 labor lamp land office Landowner Law Rep length lien lode claims marsh-gas ment mineral lands mining claims motive-column Mueseler lamp necessary notice owners party patent perimeter person placer claim plat possession posting pounds per square pressure per square prior public lands purchase purposes quantity of air quartz record regulations repealed resistance revolutions per minute rubbing-surface rules safety-lamp Section Sickels square feet square foot Stat statute surface survey temperature thereof tion tunnel United upcast vein or lode velocity VENTILATION volume of air water-gauge weight
Popular passages
Page xxxi - States governing their possessory title, shall have the exclusive right of possession and enjoyment of all the surface included within the lines of their locations, and of all veins, lodes, and ledges throughout their entire depth, the top or apex of which lies inside of such surface lines extended downward vertically, although such veins, lodes, or ledges may so far depart from a perpendicular in their course downward as to extend outside the vertical side lines of such surface locations.
Page xxxi - On each claim located after the tenth day of May, eighteen hundred and seventy-two, and until a patent has been issued therefor, not less than one hundred dollars' worth of labor shall be performed or improvements made during each year.
Page xxxi - ... upon a failure to comply with these conditions, the claim or mine upon which such failure occurred shall be open to relocation in the same manner as if no location of the same had ever been made, provided that the original locators, their heirs, assigns, or legal representatives, have not resumed work upon the claim after failure and before such location.
Page xxxi - It shall be the duty of the adverse claimant, within thirty days after filing his claim, to commence proceedings in a court of competent jurisdiction, to determine the question of the right of possession, and prosecute the same with reasonable diligence to final judgment; and a failure so to do shall be a waiver of his adverse claim.
Page xxxi - Every person above the age of twenty-one years, who is a citizen of the United States...
Page 153 - Mining claims upon veins or lodes of quartz or other rock in place bearing gold, silver, cinnabar, lead, tin, copper, or other valuable deposits...
Page xxx - ... local customs or rules of miners in the several mining districts, so far as the same are applicable and not inconsistent with the laws of the United States.
Page xxxi - ... and he shall also post such notice in his office for the same period. The claimant at the time of filing this application, or at any time thereafter, within the sixty days of publication, shall file with the register a certificate of the United States surveyor general that five hundred dollars...
Page xxxi - ... survey and sale, there have been homesteads made by citizens of the United States, or persons who have declared their intention to become citizens, which homesteads have been made, improved, and used for agricultural...
Page xxxi - Whenever, by priority of possession, rights to the use of water for mining, agricultural, manufacturing or other purposes, have vested and accrued, and the same are recognized and acknowledged by the local customs, laws and the decisions of courts, the possessors and owners of such vested rights shall be maintained and protected in the same...