Crossword-Solution: OYLS 4 letters, 14 clues 🏆 scrabble score: 7

Now since the Chymical Oyls, by reason of their great prices are most of them adulterated, and very few of them right good, and that nothing hath been published on this matter, and to leave the buyers of them unexcusable, I shall here add briefly, yet sufficiently the ways to discover these Cheats.

Some others draw deep tinctures from the said Spices with Spirit of Wine highly rectified, and sell them for the Oyls; but these mix with the water throughout, neither swimming, nor sinking.

Others more craftily digest with the said tinctures some of the true Oyls, which compound being put into water, will for a time render it white.

The best way to try by firing, is to put a drop or two of these Oyls on the end of a broad pointed Knife, which being first heated, and then thrust into a lighted Candle, presently take fire, and break out into a flame with much dark smoak; but if you will try them in a Spoon, heat it first over a Candle, and then blow the flame of lighted paper, or of a Wax Candle on them.

But on the contrary, all Oyls drawn from Plants by distillation hardly flame, and the flame soon goes out, and the smoak gives a full flavour of the Plant it self, whereas those sophisticated as before, differ from the true in both.