The provision of piped water for human consumption and industrial use, and the protection of water resources against pollution by water carried wastes from households or enterprises are problems fundamentally related to ...

Le Niger se trouve dans la zone tropicale sèche de l'Afrique occidentale, à 700 km environ de l'Océan Atlantique. II s'étend entre 11f 37" nord et 23’ 33" nord, 0° 06 est et 16° du méridien du Greenwich. Les frontières ...

Les progrès suivants ont été accomplis dans l'exécution des divers projets spéciaux de haute priorité: la documentation concernant les Etats membres s'enrichit constamment. Les publications et les cartes récentes donnent ...

Although there is still a great need for basic research in-connexion with the assessment of water resources and for special studies on the development of these, much knowledge does already exist. The spreading of this ...

Dans les autres localités mentionnées plus haut ou on a trouvé du beryl. on a procédé à des prospections, à l'aide de méthodes modernes, pour décéler la présence de beryllium.

The distribution, occurrence, methods of mining, ore dressing, reserves, production and planned future exploration efforts in respect of beryllium and columbium-tantalum minerals in Uganda are described. The outlook for ...

The importance of rare metals in scientific and technical progress has been steadily increasing since the beginning of this century. At the present time it is difficult to conceive any field of modern science which does ...

In the developing countries electricity supply is almost invariably organized on a local basis. This is due to the concentration of consuming centers in certain limited areas and to the relatively high cost of transmission ...

The preceding Chapters have touched on various influences which affect the development of electricity consumption in different countries of Africa. On the one hand economic growth leading to higher total national output ...