206 



COALFIELDS AND COLLIERIES OF AUSTRALIA. 



gallons per hour, and the 

 per hour,, while the third 



io water, and further serves to fill up any cracks that may 

 form in the outer wall. 



The first water feeder, when struck, gave oft' 17,000 



second 8000 to 9000 gallons 

 at first gave off some 4000 

 Vallons per hour, but soon steadied down to a constant flow of 

 360 gallons per hour; now the combined flow has been reduced 

 to 1850 gallons per hour. While sinking, there were two 

 steam- pumps at the second lodgment, a single and a duplex 

 Knowles, neither of which was powerful enough to raise the 

 water to the surface, so the single pump was used to lift the 



Fig. 127 Corrimal and Balgownie Air Shaft Head Frame. 



-water to the upper lodgment, from which the suction pipe of 

 the duplex pump started. By diminishing the head in this 

 manner, the duplex pump was able to raise all the water to 

 the surface. The water from the shaft flowed into a pond, 

 the water did not escape into the river, as it was all required 

 for brick-making purposes. Now the water from the feeders 

 in the shaft is carried by some 9000ft. of piping, and delivered 

 at the surface through the daylight tunnel. Preparations are 

 being made for the installation of two Evan's hydraulic 

 pumps at the bottom of the air shaft, both to be operated by 



