THE DETERMINATION OF SILICA AND ALUMINA IN IRON ORES

clrochloric acid. The contents of tile 1)eaker rvere theii Ijoiied, after. tlic first action was completed, until the cliroiiiate and periiiaiigaiiate...
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clrochloric acid. T h e contents of tile 1)eaker rvere theii Ijoiied, after. tlic first action was completed, until the cliroiiiate and periiiaiigaiiate \\-ere reduced. An additioii of I O cc. cf iiitric acid ( 1.71.) j follon.ed. aiicl tlie steels analysis was carried out exactly ns given for c~iroiiiiuiii-iiicl~el using twenty-four granis of citric acid. The results obtained lire given iu Table 4. Sulphiiric acid \vas added as i i i the process for steel.