HAVING, in the first Edition of the foregoing Discourse, Ch. 5. Inst. 1. §. 8. made mention of the preparation of Essential Oyls, so as to become easily mingleable with any unoyly Liquor. I shall here acquaint the Reader, That this may be done, by digesting any of the said Oyls with about an equal quantity of the Yelk of an Egg, with a very soft heat, like that of the Meridian Sun in Summer, continued for the space of three Weeks or a Month; and in the mean time, to be now and then stirred a little together. The Yelk will by degrees, imbibe the Oyl, and at length be incorporated with it, and become a Balsam, as white as Milk, easily dissoluble in any watery or winy Liquor.

2. §. I confess, that it will be very difficult to prepare any good quantity for use, this way. But this being a sufficient proof of the possibility of such a Mixture; I considered, whether the application of some other forementioned Cause of Mixture, might not supply the defect of this: and hereupon, have made several successful tryals; not only for the mixing of the said Oyls, but likewise of all sorts of Rosins and Gums with any winy or watery Liquor, in great quantities, in a short time, and without much trouble. But for the mixing of some of them, the Yelk of an Egg alone will not serve, without the intervening of some other sociable Body, Ch. 5. Inst. 1. §. 6. according to one of the Rules given in the foregoing Discourse.

3. §. In the same Discourse, upon certain premises, I have laid down this following conclusion. Ch. 5. §. 5.

“—— By accumulating the Causes of Mixture, that is, by joyning two or three or more together; or by applying more in some cases, where Nature applyeth fewer; we may be able to make, if not a more perfect, yet a far more speedy Mixture, than Nature doth. As by joyning COMPRESSION, Heat, and violent Agitation, and so continuing them altogether, by some means contrived for the purpose, for the space of a Week or Month, or longer without Cessation. Which may probably produce, not only strange, but useful effects, in the SOLUTION of some, and the Mixture of other Bodies.”

4. §. For the proof whereof, and that I had throughly weighed what I have said, Mr. Pappin hath since given us an ingenious Instance, in his new Digester. Which is, a Balneum Mariæ clausum: all Infusions and Digestions made with Double Vessels, having hitherto been made with the outer Vessel, open. So that whereas by the old way of Digestion, there is no other Power made use of but that of Heat: in this way, that also of Compression is joyned therewith.