…showed first 75 words of 472 total…

…showed last 75 words of 472 total…ported by A. de Ulloa. Some of this "platina" was taken to England, and soon thereafter many leading chemists published reports on it. A process discovered about 1803 by W. H. Wollaston for making the metal malleable made possible its commercial use for laboratory apparatus and other purposes. Although platinum was used as an adulterant for gold over a century ago, it is now considered the more valuable of the two. ogens, sulfur, or caustic alkalies.