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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 68, page id 1677894601:0244
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=244
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68
hit upon itS POres, and the red upon IES parES. LasIY,
vere the rays ot Lighit reflected br impingins on the
Colid parts ot Bodies, their reflexions from polisted B0-
dies could not be (0 regular a5 ther arc. FOr in PO-
littrins Class with Sand, Putr or Pripoly, it is not to
De imasined that those substances can by sratins and
Trettins the Cla(s brins aI its least particles to an ac-
curate polist; (o that alI their Curtaces Mail BC truly
plain or truly Spherical, and look aIl ttre same way, lo
a5 toscther to compose one even surtace. The Pinallex
the particles of thole substances arc, the Imaller rii
Dethe Scratches by irhich ther continually tret and rear
array theCilass until it be politted, but be ther nerer
(0 linall they can rear array the Glass no othermile
than by gratins and seratchins it, and breakcins the
proturberances, and theretore polistr it no otherwile
than by bringins its rouchinessto a very tine GTrain, (0
that the scratches and Frettings of the surtace become
t00 (mall to be risible. And theretore il Lisht iere
reflected by impinsins upon the Colid parts of theGilals,
it rould De scattered as much by the most polished
Glas as by the roughest. So then it remains à PrO-
blem, hou Gilass polistred by frettins substances can re-
Rect Light so regularly as it docs. And this Problem
i5 scarce otherrrile to De Tolred than by Paving; that
the reflexion ot a ray is effected, not by a snsle point ot
the reflectins Bodr, but by fome porver ot the Body
irtrich is erenty diffused all over its Curtace, and by
erhich it aets upon the rar rithout immediare contact.
For thatthe parts of Bodies do act upon Light at a di-
Aance Phail be Mewn hereatter.
Now