Show more work from coat coal i in recent years the efficiency e fal clency of a ton of coal hap anc been greatly increased ond and it Is stated elated this has been accorn mainly through the activities of the electric power companies by which all suggested improvements are tried out and adopted when warranted between 1000 and 1927 1027 the increase in the amount of power used represented 05 per benc cent whereas th the increase in the amount of ava PA icel need only 17 per cent n v i ii vs K A afif djs y s nis |