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.

AN APPENDIX Shewing how to Make GLASS-EYES Very Natural.

THIS Secret is fine, and never was made publick before: The Eyes may be done so curiously, that the Nicest Examina∣tion can scarce discover them to be Ar∣tificial.

You must have a lighted Lamp, and a long hol∣low piece of Crystal, as thick as the middle of a Pipes Shank; the Bore must be pretty wide, and the Pipe about four Inches in length; let the Mouth∣end be like that of a Trumpet, and the other wi∣dened and turned outwards like the Breech; this may be done by heating one end in the Flame of your Lamp, and whilst it is hot, turn it so with a pair of Nippers.

Hold this Pipe in your left hand (having before put a little Cotten into it, about an Inch or less from the Mouth, to hinder your Breath from being too

violently blown on the Work;) let it be between your two Fore-fingers and Thumb (as you'd make a Pen;) heat the Wide end in the Flame red hot, and so wind long Thread White Enamel about the grossness of a Bugle; your Threads must be red hot too, and solid, then they'll easily joyn the Crystal Pipe; make by this Serpentine Winding a Convex of such Diameter, as when blown out will answer that of the Eye you would imitate.

This done, keep the Work in the Flame till red hot, and so blow it out into an Orbicular Form, of a just largeness; then heating a-new the top, pinch with your Nippers a small Hole, and so turn it with the end of them round, of the bigness your Eye must be within the White, in this Hole wind pure Thread-Crystal as small as fine Packthread, till you fill it up, taking away the Superfluity (if any) with your Nippers; heat it in the Flame, blowing gently often; by this the Crystal will work Convexly, to give you the full shape of your Eye.

Upon this Crystal (heating it again) you must wind Crystal Thread small almost as Horse-hair, and coloured as the Eye you'd imitate; cover it once o∣ver, and as soon as the Center fills, cut off the Thread with your Nippers, that no Surplus re∣main: You must hold it often in the Flame, still gently blowing to keep it in a true order.

Afterwards with a piece of Black Enamel, about the thickness of a Duck-Quill, lay on the Black of the Eye; be very careful not to give any of these Threads or pieces of Enamel, too great a heat, nor apply too much of this Black, for it will spread; therefore you must proportion your Heats and Quantities very exactly, still continuing the Work in the Flame, and gently blowing as often as you'd restore it to its Shape: After this, cover the Cry∣stalline part of the Eye with some Crystal of a solid

[illustration]

AB, is the Cristal Pipe

A, the Mouth

C, where the Cotten must be

B, the widened end of the Pipe

BD, the glass eye a makeing

E, the forme of the Eye shewing how the small coloured threads must be laid on

piece, about the thickness of a Goose-Quill, and so heating and blowing as before, bring it to its due Form. Then hold the Side thereof in the Flame, and with a Thread of White Enamel, not quite so hot, you may as it were cut out the Shape of your Eye, as you'd have it, Oblique, or otherwise; then border it with the said Thread, holding the Edges in the Flame, to become smooth and even.

Now if you find too much Enamel in any part of the Border, you may take it off with another Thread of the same Enamel, not altogether heated so much as that you'd diminish, which must be held in the Flame accordingly: Then proceed to Cutting or Filing; and last of all, Anneal it in a small Pan of ••••als, and you have finished.

FINIS.