Experiments and Considerations Touching Colours | Page 6

and by changeable Taffities
(37, 38, 39.) _The Authors wish that the Variety of Colours in Mother
of Pearl were examin'd with a_ Microscope (40.) _And his Conjectures,
that possibly good_ Microscopes _might discover those Superficial
inequalities to be Real, which we now only imagine with his reasons
drawn partly from the Discoveries of the_ Telescope, and Microscope
(41.) And partly also from the Prodigiously strange example of a Blind
man that could feel Colours (42.) whose History is Related (43, 44, 45.)
The Authors conjecture and thoughts of it (46, 47, 48, 49.) and several
Conclusions and Corollaries drawn from it about the Nature of
Blackness and Black Bodies (50, 51, 52.) _and about the Asperities of
several other Colour'd Bodies_ (53.) _And from these, and some
premis'd Considerations, are propos'd some Conjectures; That the
reason of the several Phænomena of Colours, afterwards to be met with,
depends upon the Disposition of the Seen parts of the Object_ (54.)

_That Liquors may alter the Colours of each other, and of other Bodies,
first by their Insinuating themselves into the Pores, and filling them,
whence the Asperity of the Surface of a Body becomes alter'd,
explicated with some Instances_ (55, 56.) _Next by removing those
Bodies, which before hindred the appearance of the Genuine Colour,
confirm'd by several examples_ (57) _Thirdly, by making a Fissure or
Separation either in the Contiguous or Continued Particles of a Body_
(58.) _Fourthly, by a Union or Conjunction of the formerly separated
Particles; Illustrated with divers Instances of precipitated Bodies_ (59.)
_Fifthly, by Dislocating the parts, and putting them both into other
Orders and Postures, which is Illustrated with Instances_ (60, 61.)
_Sixthly, by Motion, which is explain'd_ (62.) _And lastly, and chiefly,
by the Union of the Saline Bodies, with the Superficial parts of another
Body, whereby both their Bigness and Shape must necessarily be
alter'd_ (63, 64.) _Explain'd by Experiments_ (65, 66.) _That the
Colour of Bodies may be Chang'd by the concurrence of two or more of
these ways_ (67.) _And besides all these, Eight Reflective causes of
Colours, there may be in Transparent Bodies several Refractive_ (68,
69) Why the Author thinks the Nature of Colours deserves yet a further
Inquiry (69.) _First for that the little Motes of Dust exhibited very
lovely Colours in a darkned Room, whilst in a convenient posture to
the Eye, which in other Postures and Lights they did not_ (70.) _And
that though the smaller Parts of some Colour'd Bodies are Transparent,
yet of others they are not, so that the first Doubt's, whether the
Superficial parts create those Colours, and the second, whether there be
any Refraction at all in the later_ (71, 72, 73.) _A famous Controversie
among Philosophers, about the Nature of Colour decided_. (74. 75.)
Chap. 4. The controversie stated about Real and Emphatical Colours
(75, 76.) _That the great Disparity between them seems to be, partly
their Duration in the same state, and partly, that Genuine Colours are
produc'd in Opacous Bodies by Reflection, and Emphatical in
Transparent by Refraction_ (78.) _but that this is not to be taken in too
large a Sense, the Cautionary instance of Froth is alleged and insisted
on_ (78, 79.) _That the Duration is not a sufficient Characteristick,
exemplify'd by the duration of Froth, and other Emphatical Colours,
and the suddain fading of Flowers, and other Bodies of Real ones_ (80.)

_That the position of the Eye is not necessary to the discerning
Emphatical Colours, shew'd by the seeing white Froth, or an Iris cast on
the Wall by a Prism, in what place of the Room soever the Eye be_ (81.)
which proceeds from the specular Reflection of the Wall (82.) _that
Emphatical Colours may be Compounded, and that the present
Discourse is not much concern'd, whether there be, or be not made a
distinction between Real and Emphatical Colours_. (83.)
Chap. 5. Six Hypotheses about Colour recited (84, 85) Why the Author
cannot more fully Speak of any of these (86.) nor Acquiesce in them (87,
88.) What Pyrophilus is to expect in this Treatise (88, 89.) What
Hypothesis of Light and Colour the Author most inclines too (90.)
_Why he thinks neither that nor any other sufficient; and what his
Difficulties are, that make him decline all Hypotheses, and to think it
very difficult to stick to any._ (91, 92.)
* * * * *
Part the Second.
_Of the Nature of Whiteness and Blackness,_
CHAP. I.
The reason why the Author chose the Explication of Whiteness and
Blackness (93.) Wherein Democritus thought amiss of these (94.)
Gassendus his Opinion about them (95.) _What the Author approves,
and a more full Explication of White, makinig it a Multiplicity of Light
or Reflections_ (96, 97.) _Confirm'd first by the Whiteness of the_
Meridian