268 COALFIELDS AND COLLIERIES OF AUSTRALIA. 



sprocket wheel on the trolley, that in turn is connected with, 

 and drives, the rear pair o wheels. A reversing switch enables 

 the trolley to move either backwards or forwards. The Good- 

 man machine (Fig. 173) makes a cut 7ft. deep and 3ft. 9in. 

 wide. It has sicle rollers at the end to assist in moving it 

 parallel with the face of the coal being cut. There is a handle 

 at the back for rotating the chain when desired to change the 

 picks. Sockets for the picks form short links in the chain, and 

 are at different angles, so as to give clearance. The pick points 

 are held in the sockets by set screws. 



A Tangye engine 10m. x lOin. is used to drive a Siemens 

 Bros.' generator. This is a direct-acting dynamo of 19.5kw., 

 65.5 amp., and 260 volts. Besides providing electricity for the 

 coal cutters, it also provides the necessary power for a three- 

 throw electric pump. 



Fig. 173. Goodman Electric Chain Breast Machine. 



Ventilation is carried out with the help of a furnace. All 

 the traction in the mine is done with horses, but the skips are 

 conveyed from the tunnel mouth to the screens for the first 

 section by gravity, and for the second by an endless rope. The 

 slack of the rope is taken up by a pulley, the bearings of which 

 slide up and down between vertical posts. 



New Lambton Colliery. 



The New Lambton and Ebbw Vale collieries are practically 

 one and the same, and belong to the New Lambton Land 

 and Coal Company of New South Wales. The New Lambton 

 worked a lower seam from a shaft, now disused; while the 

 Ebbw Vale works a top seam, 240 to 250ft. higher up, from a 

 tunnel. The tunnel and shaft are close together, and the 

 screens and weighing machines, which are located near the 

 shaft, are used for the coal now brought out from the tunnel. 



