§ Mr. HARDIEasked the Secretary for Mines whether he can give the percentage of steel props as against wood props used in British coal mines?
§ Captain CROOKSHANKI regret that the particulars desired are not available, but a good deal of information as to the use of steel for various forms of roof support is published in the Annual Reports of the Divisional Inspectors of Mines for 1934 and previous years.