§ Mr. W. THORNEasked the Minister of Munitions if he is aware that the loss in the illuminating and heating power of gas caused by benzol, toluol, and xylol being extracted can be made good by the use of oil and cannel coal; and if he will require gas undertakings where the test is abolished to use artificial substances to maintain the quality of gas or otherwise reduce the price to consumers?
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§ Dr. ADDISONConsideration of cost and of difficulty in obtaining the materials required restrict the possibility of adopting the processes described, and, as my right hon. Friend has previously explained, the deterioration in quality of the gas supplied to consumers is hardly appreciable.