THE BATTLE FOR FUEL What is a HEDGEHOG? "HEDGEHOG", in modern warfare, is the term used to describe massed resistance— infinitely more effective than scattered strength. The same thing is true in the case of the coal you burn; look on any large lump as your hedgehog. Don't break it up. KEEP THE POKER ON THE HEARTH A good sized lump of coal weighs about 5 lb. Broken up into five pieces, it will blaze away fiercely. Left and well banked, it will burn for nearly three times as long. The heat won't go up the chimney either, as it is apt to do when the fire blazes.