The Blew and Yellow scarce exhibited any thing but a Darker Yellow, which
we ascrib'd to the Coarseness of the Blew Papers, and its Darkness in its
Kind. For applying the Blew parts of the Marbl'd Paper with the Yellow
Paper after the same manner, they exhibited a good Green.
The Yellow and Red look'd upon together gave us but a Dark Red, somewhat
(and but a little,) inclining to an Orange Colour.
The Purple and Red look'd on together appear'd more Scarlet.
The Purple and Yellow made an Orange.
The Green and Red made a Dark Orange Tawny.
The Green and Purple made the Purple appear more Dirty.
The Blew and Purple made the Purple more Lovely, and far more Deep.
The Red parts of the Marbl'd Paper look'd upon with the Yellow appear'd of
a Red far more like Scarlet than without it.
[Page 191]
But the Fineness or Coarseness of the Papers, their being carefully or
slightly Colour'd, and divers other Circumstances, may so vary the Events
of such Experiments as these, that if, _Pyrophilus_, you would Build much
on them, you must carefully Repeat them.
_EXPERIMENT IV._
The Triangular Prismatical Glass being the Instrument upon whose Effects we
may the most Commodiously speculate the Nature of Emphatical Colours, (and
perhaps that of Others too;) we thought it might be usefull to observe the
several Reflections and Refractions which the Incident Beams of Light
suffer in Rebounding from it, and Passing through it.
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