Show pure pre coal M much uch of our english coal is of a soma what low quality not only does it con tain slate and other earthy impurities but also unfortunately pyrites more mora than one cue half of which consists of sulphur our coal fields are being worked out with a velocity which produces anxiety in the minds of all who are inter ested about the future of the country we cannot afford to waste even the poorest kind of fu fuel eland and the propriety of destri restricting acting exportation has repeatedly been urged with powerful arg arguments but bat in the meantime the barnin burning of impure and dirty coal is a source of tribulation to housekeepers and of injury to manufacturers A process of mr buhrig luhrig ludrigs Luh rigs I 1 s appears to be an improvement upon various previous attempts renders it possible for colliery owners to clean and to some extent purify without great ez expense pense the coal before it is sent away the system involves a series of operations in which are in |