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
... direction of the sight may be correctly read . As the circle is graduated to 1 ° , a little prac- tice will enable the surveyor to read the bearings to quarters , estimating with his eye the space bisected by the point of the needle ...
... direction of the sight may be correctly read . As the circle is graduated to 1 ° , a little prac- tice will enable the surveyor to read the bearings to quarters , estimating with his eye the space bisected by the point of the needle ...
Σελίδα 78
... direction by working the screws with an ordinary adjusting pin . The intersection of the wires forms a very minute point , that , when adjusted , determines the optical axis of the telescope , and enables the surveyor to fix it upon an ...
... direction by working the screws with an ordinary adjusting pin . The intersection of the wires forms a very minute point , that , when adjusted , determines the optical axis of the telescope , and enables the surveyor to fix it upon an ...
Σελίδα 82
... direction , and a secondary meridian or base line passing through this point at right angles to the first , or in an exact east - and - west line . Any point on the map will then be a certain distance north or south , and 82 SURVEYING.
... direction , and a secondary meridian or base line passing through this point at right angles to the first , or in an exact east - and - west line . Any point on the map will then be a certain distance north or south , and 82 SURVEYING.
Σελίδα 83
... direction of the hands of a watch . The sines of angles are eastings and westings , and the cosines are northings and southings . TRAVERSING A SURVEY To traverse a survey , means to determine by calculation how far north or south and ...
... direction of the hands of a watch . The sines of angles are eastings and westings , and the cosines are northings and southings . TRAVERSING A SURVEY To traverse a survey , means to determine by calculation how far north or south and ...
Σελίδα 95
... direction of the force . W W v = ve- FIG . 5 locity of W ; ' velocity of P ; P = W ; v = v ' . = FIG . 6 As In the movable pulley , shown in Fig . 6 , one - half of the weight is sustained by the hook , and the other half by the power ...
... direction of the force . W W v = ve- FIG . 5 locity of W ; ' velocity of P ; P = W ; v = v ' . = FIG . 6 As In the movable pulley , shown in Fig . 6 , one - half of the weight is sustained by the hook , and the other half by the power ...
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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.