Examination of English Coking Coals (i.) Parkgate Brights ex Manvers Main Colliery, South Yorkshire ii.) Blend of Parkgate and Silkstone Brights ex Aldwarke Main Colliery, South Yorkshire iii.) Blend of Tupton and Black Shale coals ex Hardwick Main Colliery, South Yorkshire)

Scope and Content

Report No. 437

Authors R. G. Davies, W. Idris Jones