CORRESPONDENCE ON PAPER NO. 6196: POST-WAR DEVELOPMENTS IN THE COAL-MINING INDUSTRY. Free

MINES, MINING, INDUSTRIES, COAL, ENGINEERING, ARCHITECTURE, DEVELOPMENT, WASTE, DISPOSAL, PLANT, TIPS, LAND, EXPENDITURE, MATERIALS, COLLIERIES, CLADDING, ALUMINIUM, BUILDINGS, INSULATION, TUNNELS, TUNNELLING, LININGS, SHAFTS, TEMPERATURE, DISTRIBUTION, CONCRETE, MEASUREMENT, VERTICAL, LOADING, LOADS, HYDRATION, WINDING, INSTALLATIONS, ERECTION, UNDERPINNING, FOUNDATIONS, STRUCTURES, BOLTS, TENSION, BORING, VENTILATION, CRACKS, SHRINKAGE, PRESSURE, TOWERS