HC Deb 30 November 1937 vol 329 c1865
28. Mr. E. Smith

asked the Secretary for Mines whether he has sufficient evidence to show that the use of sheathed explosives in mines where fire-damp may occur tends to eliminate ignition; arid is it proposed to take any action?

Captain Crookshank

Yes, Sir, I have good reason to believe that, m mines where there is danger from fire-damp, sheathed explosives, which are now extensively used, contribute towards safety in shot-firing. As regards the second part of the question, I will consider the possibility and advisability of a general measure of compulsion to the use of sheathed explosives as soon as certain outstanding technical problems have been solved. Meanwhile, I am glad to say rapid progress is being made in their adoption on a voluntary basis.