362 COALFIELDS AND COLLIERIES OF AUSTRALIA. 



works two endless rope haulages, which travel at the rate of 

 li to If miles per hour. The endless rope is fed by twc 

 jigs 011 a grade of 1 in 18, and a main and tail rope driven 

 from the surface, which passes down the air shaft. Electric 

 secondary haulage is about to be installed. 



The air shaft (Fig. 227) has a wooden head frame, and is 

 provided with a cage that runs on two rope guides. There is 

 a special approach to the shaft for men, provided with an air 

 lock. The fan used is a 12ft. Capell fan, for which there is a 

 duplicate engine. 



Fiar. 227. Air Shaft. 



Seventy-five per cent, of the coal won is undercut by ma- 

 chines, of which there are 12 Sullivan shortwall machines, 

 and 4 Jeffrey chain breast machines. The pick and chisel 

 points of these machines after being shaped by the blacksmith 

 are finished off on an emery wheel. 



Four Tangye three-throw pumps, Tin. by Gin., driven by 

 10 h.p. electric motors, are used for pumping out the dip faces. 

 The new pump, a three-throw 9in. by 12in., will supplant the 

 present pumps, and will raise 22,OOCf gallons of water against 



