

SKA HAM NO. 1 COLLIERIES. 



277 



nozzle at the other end. Where bailing has to be done in 

 dip workings, the water is conveyed away in a similarly- 

 arranged barrel. The air is circulated by a 30ft. diarn. Waddle 

 fan, which is given b'0-03 revolutions per rniiinte. 



The pit-head frame is constructed of steel. The steam 

 hoist made by Grant, Ritchie and Co., of Kilrnarnock, is direct 

 acting, has slide valves, 26in. diani. cylinders and 5ft. stroke. 

 The drum is conical, having 12ft. and 19ft. diameters, and a 

 splash board at the back prevents the rope dressing from being 

 scattered about the engine room. 



Shaking screens are used for screening the coal, but when 

 "shandygaff" is required, a sheet of iron is bolted 011 to the 



Fig. 180. Coal Boxes. 



bars of the screen. If on passing over the picking belt, it is 

 suspected that more than 201b. of dirt to a skip are picked out, 

 it is put on one side and weighed, and if found to be in excess 

 of the amount allowed, the man responsible for the skip is 

 suspended, unless he can give a reasonable explanation. The 

 slack not required for immediate shipment is conveyed up an 

 incline in. a hopper-skip to rectangular wooden coal boxes 

 (Fig. 180). 



The boilers are of the Cornish type, 28ft. long by 5ft. Gin. 

 in diameter. The feed-water is heated bv exhaust steam, and 



