A Treatise on Practical and Theoretical Mine VentilationJ. Wiley & Sons, 1904 - 141 sivua |
Kirjan sisältä
Tulokset 1 - 5 kokonaismäärästä 11
Sivu 15
... gallery , and there remain , because of its being lighter than air . It is also said that car- bonic acid , being heavier than air , lodges on the " floor " or " thill " of a mine . Mr. Thomas $ 7 . 15 MINE VENTILATION .
... gallery , and there remain , because of its being lighter than air . It is also said that car- bonic acid , being heavier than air , lodges on the " floor " or " thill " of a mine . Mr. Thomas $ 7 . 15 MINE VENTILATION .
Sivu 17
... gallery by virtue of its lesser density , is forced downwards until it finds its way into the holes and other receptacles , and is continually fed from above . " When marsh - gas escapes from the floor , and makes its appearance in ...
... gallery by virtue of its lesser density , is forced downwards until it finds its way into the holes and other receptacles , and is continually fed from above . " When marsh - gas escapes from the floor , and makes its appearance in ...
Sivu 18
... gallery or heading , it indicates that the gas is given off in greater quantity than can be carried off by the ventilation ; and , where any such accumula- tion takes place , there must be either a deficiency of ventilation , or an ...
... gallery or heading , it indicates that the gas is given off in greater quantity than can be carried off by the ventilation ; and , where any such accumula- tion takes place , there must be either a deficiency of ventilation , or an ...
Sivu 41
... galleries of a mine , it rubs against all the exposed surfaces . This rubbing gives rise to the resistance called " friction . " Friction of air in mines is so great , that , out of every ten parts of power employed for the ventilation ...
... galleries of a mine , it rubs against all the exposed surfaces . This rubbing gives rise to the resistance called " friction . " Friction of air in mines is so great , that , out of every ten parts of power employed for the ventilation ...
Sivu 64
... √4 :: 9000 : 4500 . ( The above illustrates in a striking manner the effect that rubbing - surface has of diminishing the flow of air through a gallery . ) The total volume will be 22,500 cubic feet ; and 64 8 24 MINE VENTILATION .
... √4 :: 9000 : 4500 . ( The above illustrates in a striking manner the effect that rubbing - surface has of diminishing the flow of air through a gallery . ) The total volume will be 22,500 cubic feet ; and 64 8 24 MINE VENTILATION .
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
Suositut otteet
Sivu 149 - Manual of Elementary Problems in the Linear Perspective of Form and Shadow T 2iIi0, i oo Plane Problems in Elementary Geometry I2mo, i 23 Primary Geometry i2mo, 75 Elements of Descriptive Geometry, Shadows, and Perspective 8vo, 3 50 General Problems of Shades and Shadows 8vo, 3 oo Elements of Machine Construction and Drawing 8vo, 7 so Problems, Theorems, and Examples in Descriptive Geometry 8vo. 2 50 Weisbach's Kinematics and the Power of Transmission.
Sivu 147 - Fuertes's Water and Public Health 12mo, 1 50 Water-filtration Works 12mo. 2 50 Ganguillet and Kutter's General Formula for the Uniform Flow of Water in Rivers and Other Channels.
Sivu 143 - Blowpipe. i2mo, morocco, i 50 Furman's Manual of Practical Assaying 8vo, 3 oo Lodge's Notes on Assaying and Metallurgical Laboratory Experiments .... 8vo, 3 oo Miller's Manual of Assaying i2mo, i oo O'Driscoll's Notes on the Treatment of Gold Ores 8vo, 2 oo Ricketts and Miller's Notes on Assaying 8vo, 3 oo "Dike's Modern Electrolytic Copper Refining.