In the period 1896-1902 the shafts were widened to 4.27 metres diameter and sunk to below the low main seam horizon at a depth of 425 metres.
12.
The whole formation thins and becomes less-ferruginous to the south as the Main Seam, itself much diminished, oversteps each of the underlying seams one-by-one.
13.
One example was the High Main seam at Walker Colliery on Tyneside, which became one of the deepest coal mines in the world, thanks to large engine cylinders which helped drain the mine.
14.
The coalfield is composed of four main seams, only one of which, the No . 1 Seam, is currently being mined, below surface, using bord and pillar mining methods and continuous miners.
15.
His most recent English collection was " Barnsley Main Seam " ( 1995 ); the long title poem celebrates the splendours of York Minster, and is a homage to the manual workers of the world.
16.
Unlike picking at the threads of the main seam, the quarter seam, if lifted, can be as easily replaced before the end of the over, when the ball is due to be inspected by the umpires.
17.
On 8 June 1850, the two of them walked the Cleveland Hills and quickly found a plentiful source, in the shape of the main seam of Cleveland Ironstone " above sixteen feet " ( about five metres ) thick.
18.
The only surviving extensive outcrop of the "'Main Seam "'occurs in woodland north of Skelton ( close to NZ 6554 1997 ) at around 50m O . D above Skelton Beck achieving a thickness of around 2.4m ( 8 feet ).
19.
He was one of those who helped win the High Main Seam, a six foot seam of high quality household coal to the east of Newcastle which was at a much deeper level around 600 feet-than the same seam to the west of the city and at one time had been thought unreachable because of the presence of water.
20.
While the main seam can be'picked at'- loosening the threads in order to create conventional swing when the ball is relatively new, more recently, an understanding has evolved that the quarter seam can be lifted on one side, presumably with the thumb or finger nails, to enable the operation of reverse swing on an already scuffed ball.
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