A Treatise on Practical and Theoretical Mine VentilationJ. Wiley & Sons, 1904 - 141 sivua |
Kirjan sisältä
Tulokset 1 - 5 kokonaismäärästä 10
Sivu 29
... various modes employed in the ventilation of collieries by plans and sections . At that time the only light used in coal - mines was the candle made of sheep or ox tallow , the § 13 . 29 MINE VENTILATION . § 13 Safety-Lamps.
... various modes employed in the ventilation of collieries by plans and sections . At that time the only light used in coal - mines was the candle made of sheep or ox tallow , the § 13 . 29 MINE VENTILATION . § 13 Safety-Lamps.
Sivu 37
... Colliery , in 1853 , to ascertain at what velocity the flame may be passed in an explosive mixture of fire - damp , were as follows : Davy lamp when moving 13 ' per second . Clanny lamp went out at 17 ' per second . Boty lamp passed ...
... Colliery , in 1853 , to ascertain at what velocity the flame may be passed in an explosive mixture of fire - damp , were as follows : Davy lamp when moving 13 ' per second . Clanny lamp went out at 17 ' per second . Boty lamp passed ...
Sivu 72
... colliery , which , over a small area , has many openings to the day of great sectional area but of little length , requires little or no mechanical ventilation . When the pits are less numerous , and the galleries are longer , we should ...
... colliery , which , over a small area , has many openings to the day of great sectional area but of little length , requires little or no mechanical ventilation . When the pits are less numerous , and the galleries are longer , we should ...
Sivu 73
... collieries alone , where this system of ventilation was adopted ( Lundhill and Risca ) , three hundred and twenty - nine lives were lost . The tendency of a current of air is naturally to choose , in passing from point to point , the ...
... collieries alone , where this system of ventilation was adopted ( Lundhill and Risca ) , three hundred and twenty - nine lives were lost . The tendency of a current of air is naturally to choose , in passing from point to point , the ...
Sivu 92
... COLLIERY EXPLOSIONS . 35. Much has been written and said upon this sub- ject , yet every now and then the public is startled with news of a recent explosion where numbers of lives have been lost . The investigations which follow are not ...
... COLLIERY EXPLOSIONS . 35. Much has been written and said upon this sub- ject , yet every now and then the public is startled with news of a recent explosion where numbers of lives have been lost . The investigations which follow are not ...
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Yleiset termit ja lausekkeet
100 cubic feet air circulating air gave air in mines air passing air-column air-course air-current airway amount anemometer asphyxia atmosphere barometer brattice carbonic acid Clanny coal coal-dust Colliery column cubic foot cubic inches Davy Davy lamp diameter discharge districts double downcast drifts Engineering equal explosion feet of air feet per minute feet square fire-damp flame formula furnace gallery gases gauze hence horse-power inches of mercury inches water-gauge increased inflammable ksv2 length Manual marsh-gas measured mechanical ventilators Mechanics mercury method miners morocco motive-column Mueseler lamp multiplied number of revolutions oxygen perimeter piston pounds per square pressure per square pressure required proportional quan quantity of air regulators resistance revolutions per minute rubbing-surface safety-lamp sectional area shaft shutter smaller airway splitting square feet square foot Suppose temperature Text-book tion tity total pressure Treatise tube upcast velocity ventilating pressure volume of air water-gauge
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