The New Encyclopaedia Britannica, Volume 29Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 6
... metal of transition Group IVb of the periodic ta- ble , lightweight , high - strength , low - corrosion structural metal , used in alloy form for parts in high - speed aircraft . A compound of titani- um and oxygen was discovered ( 1791 ) ...
... metal of transition Group IVb of the periodic ta- ble , lightweight , high - strength , low - corrosion structural metal , used in alloy form for parts in high - speed aircraft . A compound of titani- um and oxygen was discovered ( 1791 ) ...
Page 65
... metals . The metal to be assayed is rubbed on the touchstone , adjacent to the rubbing of a sample of a metal of known purity . The streaks of metal are then treated with nitric acid , which dissolves impurities and thus heightens the ...
... metals . The metal to be assayed is rubbed on the touchstone , adjacent to the rubbing of a sample of a metal of known purity . The streaks of metal are then treated with nitric acid , which dissolves impurities and thus heightens the ...
Page 182
... metal could be prepared from the acid . Both names , tungsten and wol- fram , have been used for the metal since the century of discovery , though everywhere Ber- zelius ' symbol W prevails . In British and U.S. usage tungsten is ...
... metal could be prepared from the acid . Both names , tungsten and wol- fram , have been used for the metal since the century of discovery , though everywhere Ber- zelius ' symbol W prevails . In British and U.S. usage tungsten is ...
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