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. LXI. The Way of making Glass of the colour of Gold Yellow, of Granat, Amethist, Saphir, Velvet Black, Milk White, Marble, Peach Flower, and deep Red: Also to make Fritt with Natural Crystal, to colour Glass of a Pearl Colour, Viper, Ruby, Topaz, Opal, Sun-flower and others, with several other particulars in this Art.

THERE are several Ways of giving Glass the Colour of Gold, of Amethist, of Sa∣phir and others; which are not unknown to the Curious in this Art; and as there is generally some one way more particular and finer than the rest, several may be ignorant of that; for that rea∣son this Third Book is destin'd to that end, viz. to

shew the best, and also to make Fritt of Natural (or Rock) Crystal, the way and Process whereof we will lay down so distinctly, that it shall be impossible for any one to miss his aim in doing it, that observes these Rules: To that end we caution those who em∣ploy themselves in making them, that they must be very punctual in the Dose, Time, and Circumstan∣ces, and Materials: For if you err in any one, the whole will be spoil'd and come to nothing, for you will have quite different Colours from what you pro∣posed to your self. We will endeavour to make our Descriptions in the following Chapters, so clear and plain, that we hope they will prove to the Reader's Satisfaction.