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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Σελίδα 76
... placed at the north and south ends ; 90 ° is placed at the E and W marks , and the graduations run right and left from the 0 to 90 ° . In reading the bearing , if the sights are pointed in a N W direction , the north end of the needle ...
... placed at the north and south ends ; 90 ° is placed at the E and W marks , and the graduations run right and left from the 0 to 90 ° . In reading the bearing , if the sights are pointed in a N W direction , the north end of the needle ...
Σελίδα 79
... placed exactly behind it . The clinometer , or slope level , is a valuable instrument for side - note work , but it is not accurate enough for a survey ; its place has been taken by the vertical circle on the transit . Clinometers are ...
... placed exactly behind it . The clinometer , or slope level , is a valuable instrument for side - note work , but it is not accurate enough for a survey ; its place has been taken by the vertical circle on the transit . Clinometers are ...
Σελίδα 86
... placed across this and driven into the hole by a hardwood shoe peg . The plummet is tied to the lower end . A cord will soon rot , and , if in the gang- way , will be pulled out by the drivers for whip lashes ; while the wire is more ...
... placed across this and driven into the hole by a hardwood shoe peg . The plummet is tied to the lower end . A cord will soon rot , and , if in the gang- way , will be pulled out by the drivers for whip lashes ; while the wire is more ...
Σελίδα 95
... placed back to back . In theory , the same formula applies to the wedge as to the inclined plane . P : W thickness of wedge : length of wedge Screws . The screw consists of an inclined plane wound around a cylinder . The inclined plane ...
... placed back to back . In theory , the same formula applies to the wedge as to the inclined plane . P : W thickness of wedge : length of wedge Screws . The screw consists of an inclined plane wound around a cylinder . The inclined plane ...
Σελίδα 97
... placed on the surfaces of sliding bodies so as to fill the cavities and spaces between the projections ; this oil or grease is called a lubricant . There is probably no factor that has a more direct bearing on the cost of production per ...
... placed on the surfaces of sliding bodies so as to fill the cavities and spaces between the projections ; this oil or grease is called a lubricant . There is probably no factor that has a more direct bearing on the cost of production per ...
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.