A Treatise on Practical and Theoretical Mine VentilationJ. Wiley & Sons, 1904 - 141 sivua |
Kirjan sisältä
Tulokset 1 - 5 kokonaismäärästä 16
Sivu v
... Motive - Column . - Head of Air . § 12. Variation of Temperature , Effects of 23 225 25 27 CHAPTER III . 25885 29 37 39 V § 13. Safety - Lamps § 14. Comparison of Safety - Lamps and their Efficiency § 14a . Detection of Fire - Damp § 17 ...
... Motive - Column . - Head of Air . § 12. Variation of Temperature , Effects of 23 225 25 27 CHAPTER III . 25885 29 37 39 V § 13. Safety - Lamps § 14. Comparison of Safety - Lamps and their Efficiency § 14a . Detection of Fire - Damp § 17 ...
Sivu 25
... 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 = the motive - column , or head of air , D = the depth of the upcast in feet ...
... 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 = the motive - column , or head of air , D = the depth of the upcast in feet ...
Sivu 26
... motive - column which would pro- duce a pressure of 3.906 pounds when the upcast has a depth of 900 feet and a temperature of 72 ° , and the downcast has the same depth and a temperature of 42 ° . Substituting in formula 5 we have 72-42 ...
... motive - column which would pro- duce a pressure of 3.906 pounds when the upcast has a depth of 900 feet and a temperature of 72 ° , and the downcast has the same depth and a temperature of 42 ° . Substituting in formula 5 we have 72-42 ...
Sivu 27
Eugene Benjamin Wilson. When calculating the weight of the motive - column , we must bear in mind that it is not the total amount of air , or the total number of cubic feet , that we seek , but the length of an air - column which has for ...
Eugene Benjamin Wilson. When calculating the weight of the motive - column , we must bear in mind that it is not the total amount of air , or the total number of cubic feet , that we seek , but the length of an air - column which has for ...
Sivu 44
... motive - column , or water - gauge . The motive - column has already been treated of , so our atten- tion may be given to the water - gauge . The water- gauge is an instrument used to measure the dynamic force of a current of air . It ...
... motive - column , or water - gauge . The motive - column has already been treated of , so our atten- tion may be given to the water - gauge . The water- gauge is an instrument used to measure the dynamic force of a current of air . It ...
Muita painoksia - Näytä kaikki
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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