Shell-GOLD, that used by the illuminers, and where-with we write gold-letters. It is made of the parings of leaf-gold, and even of the leaves themselves, reduced into an impalpable powder, by grinding on a marble with honey. After leaving it to infuse some time in aqua fortis, they put it in shells, where it sticks. To use it, they dilute it with gum-water, or soap water.