s to be
fit to Reflect outwards much of the Light that falls even upon Them; as you
may possibly better apprehend, when we shall come to treat of Whiteness and
Blackness. In the mean time it may suffice, that you take Notice with me,
that the Blind mans Relations import no necessity of Concluding, that,
though, because, according to the Judgment of his Touch, Black was the
Roughest, as it is the Darkest of Colours, therefore White, which
(according to us) is the Lightest, should be also the Smoothest: since I
observe, that he makes Yellow to be two Degrees more Asperous than Blew,
and as much less Asperous than Green; whereas indeed, Yellow do's not only
appear to the Eye a Lighter Colour than Blew, but (by our first Experiment
hereafter to be mention'd) it will appear, that Yellow reflected much more
Light than Blew, and manifestly more than Green, (which we need not much
wonder at, since in this Colour and the two others (Blew and Yellow) 'tis
not _only_ the _Reflected Light_ that is to be considered, since to produce
both these, _Refraction_ seems to Intervene, which by its Varieties may
much alter the Case:) which both seems to strengthen the Conjecture I was
formerly proposing, that there was something else in the _Kinds_ of
Asperity, as well as in the _Degrees_ of it, which enabled our Blind man to
Discriminate Colours, and do's at least show, that we cannot in all Cases
from the bare Difference in the Degrees of Asperity betwixt Colours, safely
conclude, that the Rougher of any two always Reflects the least Light.

16. But this notwithstanding, (_Pyrophilus_) and what ever Curiosity I may
have had to move some Questions to our Sagacious Blind man, yet thus much I
think you will admit us to have gain'd by his Testimony, that since many
Colours may be felt with the Circumstances above related, the Surfaces of
such Coloured Bodies must certainly have differing _Degrees_, and in all
probability have differing _Forms_ or Kinds of Asperity belonging to them,
which is all the Use that my present attempt obliges me to make of the
History above deliver'd, that being sufficient to prove, _that_ Colour do's
much depend upon the Disposition of the Superficial parts of Bodies, and to
shew in general, _wherein_ 'tis probable that such a Disposition do's
(principally at least) consist.

17. But to return to what I was saying before I began to make mention of
our Blind _Organist_, what we have deliver'd touching the causes of the