A Treatise on Practical and Theoretical Mine VentilationJ. Wiley & Sons, 1884 - 141 sivua |
Kirjan sisältä
Tulokset 1 - 5 kokonaismäärästä 43
Sivu 22
... velocity of 32.16 ' at the end of the first second : hence we have ( 2 ) v = √4gh = 8.0208 √ī . In this equation h represents the necessary height , in feet , of a vertical air - column which will produce by its weight a velocity ...
... velocity of 32.16 ' at the end of the first second : hence we have ( 2 ) v = √4gh = 8.0208 √ī . In this equation h represents the necessary height , in feet , of a vertical air - column which will produce by its weight a velocity ...
Sivu 23
... velocity . CHAPTER II . NATURAL VENTILATION . 10. MOTION in air is caused by pressure , or differ- ence of pressure . When air becomes heated , it ascends , because it assumes a larger volume ; and , as the same volume of cold air is ...
... velocity . CHAPTER II . NATURAL VENTILATION . 10. MOTION in air is caused by pressure , or differ- ence of pressure . When air becomes heated , it ascends , because it assumes a larger volume ; and , as the same volume of cold air is ...
Sivu 25
... velocity of wind between twenty - five and thirty miles per hour . 11. The " motive - column " is a " head of air " of such a height that it will equal the difference between the weight of the downcast and upcast columns of air . Let M ...
... velocity of wind between twenty - five and thirty miles per hour . 11. The " motive - column " is a " head of air " of such a height that it will equal the difference between the weight of the downcast and upcast columns of air . Let M ...
Sivu 28
... be as nearly as practicable on the same level . High winds , directed by hills , blowing against the exhaust duct of a fan , greatly impede its action . TABLE III . VELOCITY AND POWER OF WINDS ( SMEATON 28-What record to contain- ...
... be as nearly as practicable on the same level . High winds , directed by hills , blowing against the exhaust duct of a fan , greatly impede its action . TABLE III . VELOCITY AND POWER OF WINDS ( SMEATON 28-What record to contain- ...
Sivu 29
Eugene Benjamin Wilson. TABLE III . VELOCITY AND POWER OF WINDS ( SMEATON ) . Velocity . Perpendicular force on Miles per hour . one square foot , in pounds avoirdupois . Common appellation of such winds . 1 .005 Hardly perceptible . 4 5 ...
Eugene Benjamin Wilson. TABLE III . VELOCITY AND POWER OF WINDS ( SMEATON ) . Velocity . Perpendicular force on Miles per hour . one square foot , in pounds avoirdupois . Common appellation of such winds . 1 .005 Hardly perceptible . 4 5 ...
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Muita painoksia - Näytä kaikki
Yleiset termit ja lausekkeet
100 cubic feet acres Act of Congress adverse claim adverse claimant affidavit airway amicus curiæ amount anemometer application asphyxia barometer brattice carbonic acid certificate circulation co-efficient coal Copp's Copp's Min court cubic feet cubic foot Davy lamp district downcast entry feet of air feet per minute filed fire-damp friction furnace held horse-power inches ksv2 labor lamp land office Landowner Law Rep length lien lode claims marsh-gas ment mineral mineral lands mining claims Mont motive-column Mueseler lamp notice owners party patent perimeter persons placer claim plat possession possessory right pounds per square prior purchase quantity of air record regulations repeal resistance revolutions per minute rubbing-surface rules and customs safety-lamp Sawyer Section Sickels square feet square foot Stat surface survey temperature thereof tion tunnel United upcast vein or lode velocity VENTILATION volume of air water-gauge weight
Suositut otteet
Sivu 11 - 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.
Sivu 12 - 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.
Sivu 12 - ... 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.
Sivu 15 - 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.
Sivu 20 - Every person above the age of twenty-one years, who is a citizen of the United States...
Sivu 151 - Mining claims upon veins or lodes of quartz or other rock in place bearing gold, silver, cinnabar, lead, tin, copper, or other valuable deposits...
Sivu 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.
Sivu 14 - ... 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...
Sivu 19 - ... 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...
Sivu 19 - 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...