300 



COALFIELDS AND COLLIERIES OF AUSTRALIA. 



separately if necessary. Any dust that settles in the dynamo 

 is cleaned out by means of compressed air, which can be 

 handled through a hose. , 



The boiler plant consists of a nest of Lancashire boilers, 

 8ft. 6in. in diameter and 30ft. long, in which steam is gene- 

 rated at a pressure of 1201bs. An A. B.C. fan is fitted to the 

 return flue of the boiler to create an induced draft. (Fig. 226.) 

 By using such a draft the stoker is able to thoroughly burn 

 the coal. AVhen the fan is in commission, both flue doors are 

 opened. 



Fig. 226. A.B.C. Fan for Induced Draught. 



A Capell fan, 12ft. in diameter by Oft. wide, with double 

 inlet, is driven by a Kobey engine, 22in. by 44in., to ventilate 

 the mine. The engine is provided with a Richardson governor 

 and shut-off gear. With a 2in. water gauge, this fun will pass 

 220,000 cubic feet air. 



An Ingersoll-Sergeant straight line single air compressor 

 is used to supply motive power for the pumps. The pumps are 

 6 to 7 Tangye, one Evans and one Mather and Platt four cham- 

 ber high lift centrifugal, which lifts the water 200ft. 



The heapstead is built on wrought iron girders supported 

 on cast-iron columns. The full skips are raised sufficiently 



