ossing one
another in almost innumerable points; and if I look'd through the Glass
upon any considerable portion of the Stuff, that (for example sake) to the
naked Eye appear'd to be Red, I could plainly see, that in that Position,
the Red thrids were Conspicuous, and reflected a vivid Light; and though I
could also perceive, that there were Green ones, yet by reason of their
disadvantagious Position in the _Physical Surface_ of the Taffity, they
were in part hid by the more Protuberant Thrids of the other Colour; and
for the same cause, the Reflection from as much of the Green as was
discover'd, was comparatively but Dim and Faint. And if, on the contrary, I
look'd through the _Microscope_ upon any part that appear'd Green, I could
plainly see that the Red thrids were less fully expos'd to the Eye, and
obscur'd by the Green ones, which therefore made up the Predominant Colour.
And by observing the Texture of the Silken Stuff, I could easisy so expose
the Thrids either of the one Colour or of the other to my Eye, as at
pleasure to exhibit an apparition of Red or Green, or make those Colours
succeed one another: So that, when I observ'd their Succession by the help
of the Glass, I could mark how the Predominant Colour did as it were start
out, when the Thrids that exhibited it came to be advanagiously plac'd; And
by making little Folds in the Stuff after a certain manner, the Sides that
met and terminated in those Folds, would appear to the naked Eye, one of
them Red, and the other Green. When Thrids of more than two differing
Colours chance to be Interwoven, the resulting changeableness of the
Taffity may be also somewhat different. But I choose to give an Instance in
the Stuff I have been speaking off, because the mixture being more Simple,
the way whereby the Changeableness is produc'd, may be the more easily
apprehended: and though Reason alone might readily enough lead a
considering Man to guess at the Explication, in case he knew how Changeable
Taffities are made: yet I thought it not impertinent to mention it, because
both Scholars and Gentlemen are wont to look upon the Inquiry into
Manufactures, as a _Mechanick_ imployment, and consequently below Them; and
because also with such a _Microscope_ as I have been mentioning, the
discovery is as well Pleasant as Satisfactory, and may afford Hints of the
Solution of other _Phaenomena_ of Colours. And it were not amiss, that some
diligent Inquiry were made, whether the _Mi