light of a pretty big Candle, (snuff'd) and the Changes that
were observ'd were these.

The Yellow seem'd much fainter than in the Day, and inclinable to a pale
Straw Colour.

The Red seem'd little Chang'd; but seem'd to Reflect Light more strongly
than any other Colour (for White was none of them.)

A fair Deep Green look'd upon by it self seem'd to be a Dark Blew: But
being look'd upon together with a Dark Blew, appear'd Greenish; and beheld
together with a Yellow appear'd more Blew than at first.

The Blew look'd more like a Deep Purple or Murray than it had done in the
Daylight.

The Purple seem'd very little alter'd.

The Red look'd upon with the Yellow made the Yellow look almost like Brown
Cap-paper.

_N_. The Caution Subjoyned to the third Experiments is also Applicable to
this.

_EXPERIMENT VIII._

But here I must not omit to subjoyn, that to satisfie our Selves, whether
or no the Light of a Candle were not made unsincere, and as it were Ting'd
with a Yellow Colour by the Admixtion of the Corpuscles it assumes from its
Fuel; we did not content our selves with what appears to the Naked Eye, but
taking a pretty thick Rod or Cylinder (for thin Peeces would not serve the
turn) of deep Blew Glass, and looking upon the Candles flame at a
Convenient distance througn it, we perceiv'd as we expected, the Flame to
look Green; which as we often note, is the Colour wont to emerge from the
Composition of Opacous Bodies, which were apart one of them Blew, and the
other Yellow. And this perchance may be the main Reason of that which some
observe, that a sheet of very White Paper being look'd upon by Candle
light, 'tis not easie at first to discern it from a light Yellow or Lemon
Colour; White Bodyes (as we have elsewhere observ'd) having more than those
that are otherwise Colour'd, of a Specular Nature; in regard that though
they exhibit not, (unless they be Polish'd,) the shape of the Luminary that
shines on them, yet they Reflect its Light more Sincere and Untroubl'd, by
either Shades or Refractions, than Bodyes of other Colours (as Blew, or
Green, or Yellow or the like.)

_EXPERIMENT IX._

We took a Leaf of Such Foliated Gold as Apothecaries are wont to Gild their
Pills with; and with the Edge of a Knife, (lightly moysten'd by drawing it
over the Surface of the Tongue, and afterwards) laid upon the edge of the
Gold Leaf; we so fasten'd it to the Knife, that being held against the
light, it conctinu'd extended