d make the white Paper, Cloth or Finger, appear
lucid like a Glowworm; and in rushing out of the Glass will sometimes
push against the finger so as to be felt. And the same things have been
found by rubbing a long and large Cylinder or Glass or Amber with a
Paper held in ones hand, and continuing the friction till the Glass grew
warm.

_Qu._ 9. Is not Fire a Body heated so hot as to emit Light copiously?
For what else is a red hot Iron than Fire? And what else is a burning
Coal than red hot Wood?

_Qu._ 10. Is not Flame a Vapour, Fume or Exhalation heated red hot, that
is, so hot as to shine? For Bodies do not flame without emitting a
copious Fume, and this Fume burns in the Flame. The _Ignis Fatuus_ is a
Vapour shining without heat, and is there not the same difference
between this Vapour and Flame, as between rotten Wood shining without
heat and burning Coals of Fire? In distilling hot Spirits, if the Head
of the Still be taken off, the Vapour which ascends out of the Still
will take fire at the Flame of a Candle, and turn into Flame, and the
Flame will run along the Vapour from the Candle to the Still. Some
Bodies heated by Motion, or Fermentation, if the heat grow intense, fume
copiously, and if the heat be great enough the Fumes will shine and
become Flame. Metals in fusion do not flame for want of a copious Fume,
except Spelter, which fumes copiously, and thereby flames. All flaming
Bodies, as Oil, Tallow, Wax, Wood, fossil Coals, Pitch, Sulphur, by
flaming waste and vanish into burning Smoke, which Smoke, if the Flame
be put out, is very thick and visible, and sometimes smells strongly,
but in the Flame loses its smell by burning, and according to the nature
of the Smoke the Flame is of several Colours, as that of Sulphur blue,
that of Copper open'd with sublimate green, that of Tallow yellow, that
of Camphire white. Smoke passing through Flame cannot but grow red hot,
and red hot Smoke can have no other appearance than that of Flame. When
Gun-powder takes fire, it goes away into Flaming Smoke. For the Charcoal
and Sulphur easily take fire, and set fire to the Nitre, and the Spirit
of the Nitre being thereby rarified into Vapour, rushes out with
Explosion much after the manner that the Vapour of Water rushes out of
an AEolipile; the Sulphur also being volatile is converted into Vapour,
and augments the Explosion. And the acid Vapour of the Sulphur (namely
that which distils under a Bell into Oil of Sulphur,) ent