The art of glass shewing how to make all sorts of glass, crystal and enamel : likewise the making of pearls, precious stones, china and looking-glasses : to which is added, the method of painting on glass and enameling : also how to extract the colours from minerals, metals, herbs and flowers ... : illustrated with proper sculptures / written originally in French, by Mr. H. Blancourt, and now first translated into English ; with an appendix, containing exact instructions for making glass-eyes of all colours.

CHAP. CLXVI. Another fixt Incombustible Sulphur.

THERE is yet another way for fixation of Sul∣phur for the same use, and several Chymical Operations, wherein it has very great Vertue.

Make strong Lye of Quick-Lime and harsh Oak∣Ashes, put therein Flowers of Sulphur until the li∣quid Surface be four Inches upmost; boil it for a con∣siderable while over the Fire, this will cleanse and purge the Sulphur from its Unctuosity and Corrup∣tion, and qualifie it for your purpose; separate the Lye from the Sulphur, and drying it, you'll have it white, fixt, and incombustible, exceeding proper for the Goldsmiths to make use of on Gold.

We cou'd prescribe several ways more to make Sulphur fixt and fusible, but these two already given are sufficient for our purpose; we reserve them there∣fore for some other place to be discovered among Matters more excellent, and of greater Curiosity, for the Advantage of such Persons who Study the im∣provement and profounder parts of Chimistry.