More steam from your COAL These bulletins show how it can be done EVERY MANUFACTURER makes it his business to know what output he can aim at from each of his raw materials; but often with one exception — COAL, most vital of all industry's raw materials. There are many managements who may be as keen as mustard in tracking down steam wastage in their plants, yet don't realise how much the output of steam from their coal tonnage might be increased by little improvements in their methods of steam production.