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Alchemical And Later Discoveries And Uses Of Alum (mineral)

Discovered and alchemical and posterior uses the presence of potassium the sulphuric alum acid was known to the alchemists. J.H. Pott and A.S. Marggraf showed that alumina was another constituent. Pott in its Lithogeognosia proved that the precipitate obtained when an alkali is versed in an alum solution is completely different from lime and chalk, with which it had been confused by G.E. Stahl. Marggraf proved that alumina is one of the components of alum, but that this ground has the particular........ Read More


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