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.
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