D. F. Ball

• Examination problems in physical chemistry
• Geology of the Glen Shee district
• Geology of the Nottingham district
• Morphology and distribution of features resulting from frost-action in Snowdonia
• Soils of Snowdon
• Technical Developments in Malting
• The soils and land use of the district around Bangor & Beaumaris, sheets 94 and 106