1. Calculus pulverizatus methodus reductionis, mirabilis et pulverizata carbone mixta in ratione 100: (21-22.5) (ratio ponderis) et combusti et reducuntur ad caliditatem 800-1100 °C, et inde refrigeratur et thermally. in liquorem diluti lixivii resolutum , posteaquam pro clarifica .
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