FURNACE REACTIONS UNDER HIGH GASEOUS PRESSURES. 



429 



(H) serving for the inlet valve, the other (G) for receiving one of the windows we 

 have already described, the size and form of the openings being such as to render 

 all fittings interchangeable with those used in the larger furnace. 



SOLI IN IXCMII 



Fig. 6. Carbon feeding mechanism for the small electric furnace. 



The ring B screws on to the end K of the furnace and supports the cover A. Into this are 



screwed the columns C which carry a thick plate of insulating material M. 

 The feeding screw Q is rotated by means of a con! passed over the pulley W ; this screw works 



in the nut P which is fixed in the centre of the insulating plate (M). 

 The electrode X is held in a clamp T which is fixed to the feeding rod R. 

 This rod passes into the furnace through the stuffing box S, which forms the upper part of the 



central steel plug E. This plug is forced by the nut N against a cupped insulating piece 



D which fits a recess in the furnace cover. 



