Abstract |
Contents: Tinstone from Madagascar Petroleum from the Mayaro-Guayaguayare district, Trinidad Production of manganese ores in India Production and uses of asbestos. The utilisation of sands containing thorium minerals Monazitic sand from Queensland Utilisation of peat Occurrence and uses of minerals containing thorium Rocks and minerals from the British Central Africa Protectorate Diatomaceous earths (Kieselguhr) and their utilisation. The supply of precious stones. The composition and properties of mineral pitch from Ijebu district, Lagos. |