The Coal Miner's Handbook: A Handy Reference Book for Coal Miners, Pit Bosses, Fire Bosses, Foremen, Superintendents, Managers, Engineers, and All Persons Interested in the Subject of Coal MiningInternaional Textbook Company, 1913 - 320 σελίδες |
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Αποτελέσματα 1 - 5 από τα 40.
Σελίδα vii
... roof pressure , Conversion table for English measures into metric , 6 . table for metric measures into English , 7 . tables , Metric , 5 . Copper wire , Properties of , 161 . Cornish pumps , 126 . Cribs , 207 . Crushers , Selection of ...
... roof pressure , Conversion table for English measures into metric , 6 . table for metric measures into English , 7 . tables , Metric , 5 . Copper wire , Properties of , 161 . Cornish pumps , 126 . Cribs , 207 . Crushers , Selection of ...
Σελίδα xii
... Roof pressure , Control of , 207 . Room - and - pillar methods , Modifications of , 215 . -and - pillar system , 202 . pillars , 210 . Rope calculations , Wire , 110 . haulage , 295 . Lay of , 104 . Ropes , Effects of sheaves or drums ...
... Roof pressure , Control of , 207 . Room - and - pillar methods , Modifications of , 215 . -and - pillar system , 202 . pillars , 210 . Rope calculations , Wire , 110 . haulage , 295 . Lay of , 104 . Ropes , Effects of sheaves or drums ...
Σελίδα 79
... roof , and strings are hung from them to furnish foresights and backsights . Plumb - bobs vary in weight and shape . The cord is best illuminated by placing white paper or cardboard behind it and holding the lamp in front and to one ...
... roof , and strings are hung from them to furnish foresights and backsights . Plumb - bobs vary in weight and shape . The cord is best illuminated by placing white paper or cardboard behind it and holding the lamp in front and to one ...
Σελίδα 85
... roof of the mine , less frequently in the floor . In the former case , a center must be established before each set - up of the transit . Places are chosen that will be least affected by subsequent work , and the stations are put in ...
... roof of the mine , less frequently in the floor . In the former case , a center must be established before each set - up of the transit . Places are chosen that will be least affected by subsequent work , and the stations are put in ...
Σελίδα 86
... roof , and into this is driven the spad . The swelling wood clamps the same and prevents it from coming out as readily as it was put in . A hole is bored in the roof with a 2 - in . twist drill and a piece of cord or a copper wire ...
... roof , and into this is driven the spad . The swelling wood clamps the same and prevents it from coming out as readily as it was put in . A hole is bored in the roof with a 2 - in . twist drill and a piece of cord or a copper wire ...
Άλλες εκδόσεις - Προβολή όλων
The Coal Miner's Handbook International Correspondence Schools Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
The Coal Miner's Handbook International Correspondence Schools Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
air-current airway alternating current anthracite battery brattice breast calculated carbon carbon monoxide cars cartridge chute circuit circular mils Coal Mining Course column Complete Coal Mining cosine cubic cylinder decimal diameter difference distance driven drum electric engine English English enrolled equal explosive face factor of safety feet firedamp formula friction gangway gauge given haulage head hoisting hole horsepower inclined inclined plane iron lamps length load logarithm longwall manway material mean effective pressure measure method miner motor multiplied P. P. TABLE pillar pipe pitch placed pounds pump rail resistance right angles roof rooms rope salary seam shaft sheave shown in Fig side sine slope specific gravity spiles split square inch station steam strands surface temperature thick timber triangle usually varies velocity ventilation vernier vertical water gauge weight wire
Δημοφιλή αποσπάσματα
Σελίδα 2 - Cubic Measure 1728 cubic inches (cu. in.) =1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu. yd.) 128 cubic feet = 1 cord (cd...
Σελίδα 3 - LIQUID MEASURE 4 gills (gi.) = 1 pint (pt.) 2 pints = 1 quart (qt.) 4 quarts = 1 gallon (gal.) 31| gallons = 1 barrel (bbl.) 2 barrels...
Σελίδα 320 - On the restoration of life, a teaspoonful of warm water should be given; and then, if the power of swallowing has returned, small quantities of wine, warm brandy and water, or coffee, should be administered. The patient should be kept in bed and a disposition to sleep encouraged.
Σελίδα 319 - Repeat these measures alternately, deliberately, and perseveringly, about fifteen times in a minute, until a spontaneous effort to respire is perceived ; immediately upon which cease to imitate the movements of breathing, and proceed to induce circulation and warmth.
Σελίδα 4 - Measures of Length. 10 millimeters (mm.) 1 centimeter (cm.) 10 centimeters 1 decimeter (dm.) 10 decimeters 1 meter (m.) 10 meters 1 dekameter (Dm.) 10 dekameters 1 hectometer (Hm.) 10 hectometers 1 kilometer (Km.) 10 kilometers 1 myriameter (Mm.) 1181.
Σελίδα 53 - The square described on the hypotenuse of a rightangled triangle is equal to the sum of the squares described on the sides containing the right angle. Prop. 30. — If the square on one side of a triangle is equal to the sum of the squares on the other two sides, the angle contained by these two sides is a right angle.
Σελίδα 319 - Silvester's method, as follows : — Place the patient on the back on a flat surface, inclined a little upwards from the feet ; raise and support the head and shoulders on a small firm cushion or folded article of dress placed under the shoulder-blades.
Σελίδα 1 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30j square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A.) 640 acres = 1 square mile (sq.
Σελίδα 53 - The circumferences of circles are to each other as their radii, and their areas are to each other as the squares of their radii.
Σελίδα 52 - If two triangles have two angles and the included side of the one, equal to two angles and the included side of the other, each to each, the two triangles will be equal.