Then mix the dried precipitate with three times its weight of lead; fuse, scorify and cupel.
Melt this button again in the scorifier and a third time in the cupel.
If you also wish to know what portion of silver is contained in the lead, melt the lead in the cupel until all of it exhales.
Afterward take the button, place it on a cupel, blow on it till it melts.
The button is taken out, purged of slag, and placed in a cupel, where the gold is separated from the lead.
The cupel, when the lead and copper are wanting, attracts the particles of gold and silver, and absorbs them.
So that the event is here nearly the same as when Gold or Silver is refined on the cupel.
Wrap these in a bit of paper, and with a small pair of tongs put them gently into the cupel.
When the fusion is again tranquil, pour; and cupel the two buttons of lead.
It requires no less than sixteen parts of the Lead to destroy it in the cupel, and separate it from Silver.