_How the volatile Stone may againe be fixed._
After all these things, this stone thus exalted, must be incerated
with the Oyle that was extracted from it in the first operation, being
called the water of the stone: and so often boyle it by sublimation,
till by vertue of the firmentation of the earth exalted with it, the
whole stone doo againe descende from heauen into the earth, and remaine
fixed and flowing. And this is it which the Philosopher sayth: _It
descendeth agayne into the earth, and so receyueth the vertue of the
superiours by sublimation, and of the inferiours, by descension_: that
is, that which is corporall, is made spirituall by sublimation, and
that which is spirituall, is made corporall by descension.