Another way to do the same.

Take two pound of Aqua fortis, make it dissolve for the space of twenty four hours, Orpiment, Sulphur, Aconite, Verdigreece, of each an ounce, unslacked Lime killed in two ounces of Vinegar thrice distilled; put it all into a Limbick, with one ounce of Salt peter, two ounces of Antimony, and all the Water shall come from it; pour it again upon the Dregs with two ounces of Arsenick in Powder, and distill it; when you would use it, dip in it a Napkin or handkerchief, which wrap about the Iron Barr, and when it has so lain three hours, you may break it with ease. Take care of the Fumes when you distill it.