§ Lieut.-Commander Fletcherasked the Secretary for Mines whether he has any information as to the use of a coal-burster with hydraulic pressure, instead of shot-firing, in any of the collieries in the Warwickshire minefield?
§ Captain CrookshankInformation on this subject was published in the annual report for 1936 and 1937 of the inspector in charge of the Midland and Southern division; and fuller information was given in a paper published in the Transactions of the Institution of Mining Engineers in February, 1937.