The Florentine bottle is used in alchemy to separate non-mixable liquids and as a dropper for carefully administering minute quantities of a valuable liquid.
The inscription \u201Caqua regia\u201D indicates a special substance\: it is a mixture of acids that dissolves metals, including gold. A stroke of gold on a porcelain plate and a drop of \u201Caqua regia\u201D reveal the quality of the gold.
Text__l35HwKOeEd-WfYQ0GneCwQ_title=The Art of Separating\: Florentine Bottle for Aqua Regia