A Treatise on Practical and Theoretical Mine VentilationJ. Wiley & sons, 1900 - 141 sivua |
Kirjan sisältä
Tulokset 1 - 5 kokonaismäärästä 78
Sivu vi
... Air flowing through Mines § 24. Problems illustrating above Laws § 25. Water Gauge and Pressure CHAPTER VII . § 26. Ventilation of Single Pits or Drifts § 27. Ventilation of Mines with Two Orifices § 28. Doors and Regulators . 43 43 47 ...
... Air flowing through Mines § 24. Problems illustrating above Laws § 25. Water Gauge and Pressure CHAPTER VII . § 26. Ventilation of Single Pits or Drifts § 27. Ventilation of Mines with Two Orifices § 28. Doors and Regulators . 43 43 47 ...
Sivu 2
... air ; their density vary- ing according to the pressure . That the atmosphere varies in pressure was recog- nized at an early period : even the Florentine pump- makers were acquainted with the fact that water could not be raised by ...
... air ; their density vary- ing according to the pressure . That the atmosphere varies in pressure was recog- nized at an early period : even the Florentine pump- makers were acquainted with the fact that water could not be raised by ...
Sivu 3
... exhaust it of air , and then weigh it . Let it now be filled with dry air at the ordinary tempera- ture and pressure , then weighed again . Upon second weighing it is found to be 31,074 grains heavier than at the first . As the weight ...
... exhaust it of air , and then weigh it . Let it now be filled with dry air at the ordinary tempera- ture and pressure , then weighed again . Upon second weighing it is found to be 31,074 grains heavier than at the first . As the weight ...
Sivu 11
... pressure , is a gas . It solidifies when subjected to great pressure ; but , as soon as the pressure is removed , it returns to the gaseous state : therefore the term " car bonic acid " is applied as well to the gas as to the acid ...
... pressure , is a gas . It solidifies when subjected to great pressure ; but , as soon as the pressure is removed , it returns to the gaseous state : therefore the term " car bonic acid " is applied as well to the gas as to the acid ...
Sivu 15
... air , it did not explode ; with five and a half times its volume , it exploded slightly ; and , when mixed with eight or nine volumes of air , the force of explosion was greatest . When there is a deficiency of ventilation , the fire ...
... air , it did not explode ; with five and a half times its volume , it exploded slightly ; and , when mixed with eight or nine volumes of air , the force of explosion was greatest . When there is a deficiency of ventilation , the fire ...
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Yleiset termit ja lausekkeet
air circulating air gave air in mines air passing air-column air-course air-current amount anemometer asphyxia atmosphere barometer brattice carbonic acid coal coal-dust Colliery column cubic feet cubic foot cubic inches Davy lamp diameter discharge districts double downcast drifts employed engine equal explosion fan-drift feet of air feet per minute feet square fire-damp flame formula furnace gallery gases gauze height hence horse-power inches of mercurial inches water-gauge increased ksv2 lamp length marsh-gas measured mechanical ventilators mercury method miners morocco motive-column Mueseler lamp multiplied number of revolutions oxygen perimeter piston pounds per square pressure per square pressure required Problem proportional quan quantity of air regulators required to overcome resistance revolutions per minute rubbing-surface safety-lamp sectional area shaft shutter smaller airway splitting square feet square foot Suppose temperature tion tity total pressure tube upcast velocity ventilating pressure volume of air