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. CCXLVI. Another Way.

THO this be a more common way than the pre∣ceding, we will not omit it, because every one may have his choice to take that Method which best suits with his Apprehension, or Conveniency.

You must, as in the former, take very fair Ori∣ental Seed Pearl ground to an impalpable Powder▪ and dissolve it in Allom-Water, then rack off that Water, and wash the Paste of Pearl which remains at bottom, first with some distilled Waters, then i•• Bean-Water, and set it in B. Mariae, or Horse-dung, to digest for a Fortnight; afterwards take out your Vessel, and the Matter being come to the Consistence of a Paste, mould up the Paste in the gilt Silver∣Moulds, as before directed, bore them with a Bri∣stle, string them on Gold or Silver Thread, and hang them in a very well closed Limbeck of Glass to prevent the Air from coming in to spoil them.

Thus dried lap them one by one in Leaves of Sil∣ver, and split open a Barble, as if you were to Fry him, and so close them all up in his Body, make a Paste of Barly-Meal, and Bake him in it, as you would a Batch of Bread, and no more, afterwards draw it out, and let them dry.

To give a Transparency and Splendour to these Pearls; if you don't care for using our Mercury-Water, instead thereof, take the Herb Grati•• squeezed in Water, put into this Water six Ounces of Seed Pearl, one Ounce of Salt-peter, an Ounce of Roch-Allom, an Ounce of Litharge of Silver; the whole being dissolved, take your dried Pearls, heat

them first, and then cool them in this Dissolution; thus do for about six times at least, heating and cooling them at this rate therein.

If your Pearl should happen to fail of coming to a sufficient hardness, you may correct and make them exceeding hard by Baking them a second time after this manner.

Take two Ounces of Calamy, or Lapis Calamina∣ris, in impalpable Powder; add to this two Ounces of Oyl of Vitriol, and two Ounces of the Water of White Eggs; put all these into a Retort, lute thereto a Receiver, and let them distil, you'll have from them a very fair Water, with which, and some very fine Barly-Meal, make a Paste, Coffin your Pearls in this, and Bake them in an Oven as before, they'll thus become exceeding hard, and recover their Natural Transparency.

There are many other Ways very good to make Pearl with Oyls, which add to the Growth and Largeness of the Seed Pearl, as much as you will have them, but all these Preparations being very te∣dious, and our Book large enough already, we are of Opinion, 'tis best to let them alone for the pre∣sent; besides, we have said enough to hand the In∣telligent Readers to those Secrets discoursed off, and taught them herein, reserving the more enlarged and fuller Instructions for the first Edition we make hereof in two Volumes.