1galena; also copper, the same either roasted or in leaves
or filings9; also the
slags of gold, silver, copper, and lead; also soda10, its slags, saltpetre, burned
alum, vitriol, sal tostus, and melted salt11; stones which easily melt
in hot furnaces, the sand which is made from them12; soft tophus13,
slags of gold, silver, copper, and lead; also soda10, its slags, saltpetre, burned
alum, vitriol, sal tostus, and melted salt11; stones which easily melt
in hot furnaces, the sand which is made from them12; soft tophus13,
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