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amount associated average annual beds Bengal Bihar and Orissa Bombay Burma cement cent Central Provinces clay coal coke Company compared considerable consumption contain continued copper countries cwts decrease deposits depth district exports fall feet fell field figures five further gallons Geol Geological given gold Government grade hills imports increase India industry iron iron-ore Italy known lead less limestone Limited localities lower Madras manganese manganese-ore manufacture material metal mica miles million mineral mines Mysore Nagpur obtained occur operations output period places plant ports present probably production Quantity quinquennium railway Rajputana range recorded reported result returns rocks salt sands Shan shown shows Singhbhum South stone supply Surv Table thickness tion tons tons valued trade United Upper varieties various veins whilst world's