SOUTH BULLI AND BELLAMBI COLLIERIES. 201 



proportion being 16:1, and as at the steering wheel the pro- 

 portion of leverage is 15:1, the total leverage on the brake is 

 240:1, less loss due to friction. The drum is made sufficiently 

 long to allow the length of each of the two ropes to be coiled 

 on in a single layer. The ropes are attached, one at each end 

 of the drum, one is wrapped over and the other under the drum, 

 and several spare laps of each rope are left on the drum when 

 either rope is extended down the incline. 



The collieiy possesses shops fitted up with three lathes, two 

 drills, a shaping machine, punching and shearing machine, 

 steam hammers, etc. Many of the apparatus are made, and all 

 the brass work is cast, on the premises. A boiler-maker is 

 kept on the spot, but only to do repairs. 



Fig. 125. Hydraulic Ram. 



The present output of South Bulli is 1550 tons per day. 

 but they can put out 1800 tons a day when they are able to get 

 the men. The Bellambi colliery has a daily output of 300 tons. 



For storage purposes they have coal bunkers at the mine 

 capable of holding 560 tons; bunkers for small coal at the 

 jetty to hold TOO tons ; 130 hopper 'trucks that hold 7 tons 10 

 cwt. each; 250 black trucks, having a capacity of 5 tons each, 

 and 90 Bellambi black trucks holding 7 tons lOcwt. each, or a 

 total storage capacity of 4160 tons. 



