Volatile, and Easy to be Extracted, is either by the Igneous Atomes, or the Agitation they are put into by the Fire, first carried up, till Forsaken by what carried it up, its Weight sinks it down into the Receiver: but all this while the other Principles of the Concrete Remain Unsever’d, and Require a stronger Degree of Heat to make a Separation of its more Fixt Elements; and therefore the Fire must be Increas’d which Carries over the Volatile Salt and the Spirit, they being, though Beleev’d to be Differing Principles, and though Really of Different Consistency, yet of an almost Equal Volatility. After them, as less Fugitive, comes over the Oyl, and leaves behinde the Earth and the Alcali, which being of an Equal Fixednesse, the Fire Severs them not, for all the Definition of the Schools. And if into a Red-hot Earthen or Iron Retort you cast the Matter to be Distill’d, You may Observe, as I have often done, that the Predominant Fire will Carry up all the Volatile Elements Confusedly in one Fume, which will afterwards take their Places in the Receiver, either according to the Degree of their Gravity, or ac-
