"Take so simple a thing as the heat insulator for steam pipes and boilers. It has been known to engineers for nearly a century that by encasing boilers and pipes with magnesia or other suitable insulators, practically all heat radiation and conduction losses could be stopped. Furthermore, it has been known to engineers that the saving in fuel thus effected would pay an annual interest of 20 per cent. on the cost of the heat insulator. But go into the basements of steam-heated residences if you want to get a conception of how rarely this knowledge is applied. The landlord may know that heat insulators would earn a big return on their cost, but since they would earn it for the tenant and not for himself, he does not cover the boiler and pipes adequately, if at all. The tenant, even if he knows the economics of heat insulating, will not spend the money for insulators whose use he may not enjoy for more than a year or two before he moves out. For similar reasons very few houses have double windows, although double windows will save fully 15 per cent. of the fuel required to heat the average house. On these matters the Fuel Administration has power to act, and it should act." FUEL CONTROL IN GREAT BRITAIN Coal mining was always one of the most significant elements in British trade. Before the war 270,000,000 tons of coal were produced in the mines of Great Britain. Parliamentary legislation of a most radical character dealing with the ownership and operation of coal mines was passed. The main provision of this legislation was described in the following passage from the London _Morning Post_: