The New Encyclopaedia Britannica: Macropaedia: knowledge in depth. 19 vEncyclopaedia Britannica, Incorporated, 1981 - Encyclopedias and dictionaries |
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Page 200
... widely dis- tributed in Africa but are rarely considered as minable reserves . The chief of these is the Sherbro deposit in Sierra Leone , where 3,000,000 tons of proved and 30 , - 000,000 tons of probable ore containing titanium are ...
... widely dis- tributed in Africa but are rarely considered as minable reserves . The chief of these is the Sherbro deposit in Sierra Leone , where 3,000,000 tons of proved and 30 , - 000,000 tons of probable ore containing titanium are ...
Page 212
... widely grown , as are two species of yam . The plantain , or cook- ing banana , is grown extensively in equatorial or tropical forest zones . Cassava ( manioc ) is widely grown , except in the north , the south , and in very dry regions ...
... widely grown , as are two species of yam . The plantain , or cook- ing banana , is grown extensively in equatorial or tropical forest zones . Cassava ( manioc ) is widely grown , except in the north , the south , and in very dry regions ...
Page 643
... widely in the chemical , refractories , ceramic , and petroleum industries ( see below Aluminum chemi- cals ) . Refining four tons of bauxite yields about two tons of alumina . A typical alumina plant , using the Bayer pro- cess , can ...
... widely in the chemical , refractories , ceramic , and petroleum industries ( see below Aluminum chemi- cals ) . Refining four tons of bauxite yields about two tons of alumina . A typical alumina plant , using the Bayer pro- cess , can ...
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