§ 72. Mr. T. Smithasked the Secretary for Mines to what extent simultaneous shot-firing is taking place; and whether the inquiry into this method is taking place?
§ Captain CrookshankThe investigations into simultaneous shot-firing which by special permission were made in certain safety lamp pits were brought to an end in July, 1936. Like investigations are still proceeding in certain naked light mines and stone drifts; for these no special permission is required.