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attached balance weight balks beam bolls bolts Bore bottom brattice bucket cage called candle Carbonic acid chain chaldron Chinley chisel clack cleat coal or stone colliery corf corves crab crib cylinder diameter door drawn drift driven drum empty tub fall fathoms feet long fire-damp flat frame frequently full tubs headways headways-course hewer hitch hole hook horse inches broad inches long inclined plane iron joint kirving kitty lamp lever means metal Newcastle Nicholson paid passing piece pipe placed planks pressure props purpose putters pyrites quantity rails rent rods rolley-way rolleys roof round safety lamp screw seam of coal set of pumps shale sheth side sinking Sir Humphrey Davy skreen small coals spears Staith stoppings strata stratum surface timber tram tub wheel tubs of coals underground usually ventilation wages waggons wedging weizes wheel winding engine wire wire rope wood yards
Page 35 - The next stage is when that crack is completed, and it assumes the shape of a metal ridge. The next is when the metal ridge reaches the roof. The next stage is when the peak of the metal ridge becomes flattened by pressure, and forced into a horizontal direction, and becomes quite close; just at this moment the coal pillars begin to sustain part of the pressure. The next is when the coal pillars take part of the pressure. The last stage is when it is dead...
Page 10 - ... given on the Tyne, and 18 guineas on the Wear, and progressive exorbitant bounties were paid to putters, drivers, and irregular workmen. Drink was lavished in the utmost profusion, and every sort of extravagance perpetrated. Nor did the evil end here, for a positive increase in rates and wages was established, to the extent of from 3o % to 4o %2.
Page 12 - A species of hitch; the roof of the seam coming down into the coal without any corresponding depression of the thill, thus causing a nip.
Page 58 - Eng.) To sit with the balls of the feet upon the ground and the knees bent, so that the thighs rest •on the calves of the legs. This position no doubt became habitual with miners from the nature of their underground work. (GC Greenwell) Hunt continuous Alter.
Page 77 - A man, according to this estimate, when working to the greatest advantage, should carry a load of 27lb. and walk at the rate of two feet in a second, or a mile and one-third an hour. ' A horse, according to Desaguliers, drawing a weight out of a well, over a pulley, can raise 2001 b.
Page 17 - Llano Estacado." The boring is done by means of oak poles, 1| inches in diameter, in 16 feet sections joined in twos by heavy iron straps. Each boring rod is therefore 32 feet long with a male screw at one end and a female screw at the other, both having very strong and heavy threads. The drill has a straight edge of 3.^ inches, and is attached to an iron rod 30 feet long and 1£ inch in diameter. To the upper end of this rod (or sinker) is attached a pair of iron slips, having a play of 16 inches...
Page 79 - ... slightly tapering round stick, used as a pattern for the opening through which molten metal is to be poured into the mold. (Standard) Running amain (Scot.). The running of a winding rope down into the shaft, due to failure of brake or other appliances. (Gresley) Running balk (Eng.). A set of timbers in the direction of a drift (at its side instead of across it) to form a support for the crosspieces. A running balk at each side, with balks or planks supported by them, is the common method of timbering...
Page 11 - At a back there is frequently a glossy parting, and sometimes a little sooty, dirty coal. When, on approaching a back, it is observed to form an acute angle with the thill of the seam, it is called an East back ; when it forms an obtuse angle, it is called a West back.
Page 63 - ... branches on the end of a long stick, to dampen the flame in a reverberatory furnace. (Dwight) Lampblack. A product obtained directly from natural gas by burning the latter under plates or rolls. (Bacon) Lamp cabin (Eng.). A place above ground, or underground near the pit bottom, where the safety lamps are repaired, cleaned, examined, lighted, and locked, before being handed to the workmen in cases where naked lights are not allowed to be taken from the bottom of the shaft. (G. C.
Page 93 - ... Sumph." Sump, in mining, the well into which drainage is run, forming the standage from which the pump draws ; or the deepest part of a collection of water from which it can be baled or pumped. Sump, that portion kept a yard or more in advance of the drift or pit, in driving a stone drift or sinking a pit, to enable the gunpowder or other explosive to act with greater advantage upon the parts left. — Greenwell, Coal Trade Terms. Sump, the part of a wide board which is first-kirved, nicked,...