Pour into some little glass some small quantity of spirit of wine
wanting all phlegm, and pour on the same some drops of this oyl by
little and little; and if the spirit of wine kindle and burn all away
the oyl is prepared after a due manner.
_NB._ I admonish that every one doth warily handle this operation:
for in these two fires, to wit, saltish and sulphureous ones, there
is great virtue hidden, the which seems probable but to a few, if
it should be manifested unto them, neither that have I consulted
or decreed that it should be made known to very many. These few
particulars do sufficiently teach after what sort such fires are to be
used in Medicine, Alchymy and other Arts; but these experiments are
sufficient.