SOUTH BULL1 AM) BKLLAMBI COLLIERIES. 



191) 



The company owns six locomotives, four of which are in 

 use at a time, the other two being held in reserve. 



On the surface at South Bulli the gravity plane has a 

 capacity of 1700 tons every nine hours. The hopper trucks are 

 run singly on the incline; the black trucks two in a set. The 

 open rope is capped by threading it through a socket., untwist- 

 ing the strands, turning the wires back on themselves, and 

 drawing back into the socket as far as it will go. The narrow end 

 is then stopped up with clay, and an alloy made up of 60 per 

 cent, lead, 30 per cent, tin, 9 per cent, antimony, and 1 per 



Fig. 123. Black Truck. 



cent, bismuth is poured in, at the wide end, to fill up the 

 spaces between the wires. The antimony is added to impart 

 hardness, and the bismuth to give fusibility. The socket is 

 then connected to the coupling chain with a pin. 



The track is very uneven, having four different grades, 

 viz., 1:2.6, 1:4, 1:7, and 1:10; moreover, it does not run con- 

 tinuously in one direction, in consequence an overhead frame 

 has had to be erected to keep the rope within bounds. An ad- 

 ditional self-acting incline, to provide facilities for handling 

 the output from a new tunnel is being constructed, over which 

 the coal will be conveyed in skips to be screened at the foot , 



