§ Mr. CHATERasked the Secretary for Mines what was the volume of the dust and slack having no economic value produced in British coal mines in 1930: and whether any of this, and if so, what proportion, would be amenable to treatment by process of low-temperature carbonisation?
§ Mr. SHINWELLThere are no official statistics of the production of "small" coal, but I would refer my hon. Friend to Chapter VI of the report of the National Fuel and Power Committee (Cmd. 3201) published in 1928, which contains some estimates prepared for that committee and gives some information on the utilisation of low grade fuels. It is not practicable to make an estimate of the proportion of the kind of coal referred to in the question which would be suitable for treatment by low temperature carbonisation processes.