§ 10. Sir R. THOMASasked the Secretary for Mines, if he will give a list of the collieries in South Wales and Monmouthshire which have installations for the treatment of coal for by-products; and the figures for the output of the more important by-products during the last five years?
§ The SECRETARY for MINES (Commodore Douglas King)The only information I have relates to coke-ovens. I will send the hon. Member a list of the colliery companies to which these works are attached, but I regret that I am unable to state the amount of the byproducts recovered.