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 4
... obtained by prefixing to the names of the principal units the Greek words deca ( 10 ) , hecto ( 100 ) , and kilo ( 1,000 ) ; the submulti- ples , or divisions , are obtained by prefixing the Latin words deci ( ) , centi ( 10 ) , and ...
... obtained by prefixing to the names of the principal units the Greek words deca ( 10 ) , hecto ( 100 ) , and kilo ( 1,000 ) ; the submulti- ples , or divisions , are obtained by prefixing the Latin words deci ( ) , centi ( 10 ) , and ...
Σελίδα 26
... obtained , PXLXAXN 33,000 H = The formula just given shows that a formula is really a shorthand method of expressing a rule . It is customary , however , to omit the sign of multiplication between two or more quantities when they are to ...
... obtained , PXLXAXN 33,000 H = The formula just given shows that a formula is really a shorthand method of expressing a rule . It is customary , however , to omit the sign of multiplication between two or more quantities when they are to ...
Σελίδα 32
... obtain the characteristic of the quotient desired . To obtain the decimal part of the quotient , divide the decimal part of the logarithm , with the positive number prefixed , in the usual manner . To this quotient prefix the negative ...
... obtain the characteristic of the quotient desired . To obtain the decimal part of the quotient , divide the decimal part of the logarithm , with the positive number prefixed , in the usual manner . To this quotient prefix the negative ...
Σελίδα 65
... obtained by subtracting the last two or three figures of the smaller function from those of the larger . These differences are used to obtain the sines , cosines , etc. , of angles not given in the table . For example , suppose that the ...
... obtained by subtracting the last two or three figures of the smaller function from those of the larger . These differences are used to obtain the sines , cosines , etc. , of angles not given in the table . For example , suppose that the ...
Σελίδα 67
... obtaining the difference , it must be remembered to choose the one between the sine of 68 ° 40 ′ and the next angle above it , namely , 68 ° 50 ' . sin 68 ° 40 ' = .9315 difference for 7 ' = .0007 difference for 19 " = . 00004 sin 68 ...
... obtaining the difference , it must be remembered to choose the one between the sine of 68 ° 40 ′ and the next angle above it , namely , 68 ° 50 ' . sin 68 ° 40 ' = .9315 difference for 7 ' = .0007 difference for 19 " = . 00004 sin 68 ...
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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.