§ Mr. Wardasked the Secretary of State for Energy what consideration has been given, in his examination of methods of fuel conservation, to the energy properties of Oxford clay, and the desirability of research into such applications as an alternative to the manufacture of Fletton bricks.
§ Mr. EadieNone. I am informed that the calorific value of Oxford clay is less than one-tenth that of coal and that the carbonaceous material is already being efficiently used as fuel in the manufacture of Fletton bricks.