NORTH BULL! COLLIERY. 



179 



that admits water to the rain ; a clamp is fastened to the rope 

 iind connected with a door by chains. When the ram with a 

 pulley at the end is forced out it draws the door up. (Fig. 

 111.) A water-pipe is laid alongside a bank of ovens, and a 

 branch made for everv four ovens, to which a hose is cpn- 

 r.i-c'ted. The coke is quenched in the oven by inserting 

 tt long iron pipe attached to the hose at one end and closed 

 at the other. Two rows of holes are drilled in the pipe in 

 such a manner that the jets of water issuing from them diverge 

 slightly. Water is only used on the coke outside the ovens 

 when not sufficiently cooled inside. The ram used for pushing 



Fig. 112. Coke Rani. 



out the coke was made by W. Da vies and Son, of Lilleshall 

 Engineering Works, Wollongpng. (Fig. 112.) It is driven 

 by a duplex engine having 9in. diameter cylinders, and is 

 treble purchase. The boiler is one of Huston, Proctor, and 

 Co's. The coke is pushed out on to rails over an incline 

 alongside a railway line. (Fig. 113.) A charge consists 

 of 6 tons of coal, and they reckon on obtaining two-thirds of 

 the coal put in as coke. 



