The "Charbonnages de France," a holding organization of the nationaliz ed French hard coal mining industry carries out its scientific and technical research work at several places, however, to the greatest extent at a central research station where 420 people among them 90 research scientists are employed. Besides that research is being carried out at a pilot coke oven plant and a pilot briquetting plant. In view of the continuously intensified competition on the part of other sources of power, the number of personnel is to be increased in the year 1961 by 15 per cent. In this research...