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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 58, page id 1677894601:0234
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58
medium, insomuch that such a (maII particle will at di-
verir oblique incidences reflect aII Ports oF C OlOUIS, In
Cogreat a varietr that the Colour relultins from them
aI, contulealy reflected trom a heap ot such particles,
must rather be a wrhite or sres than anr other COlOuT,
Or at best it must be but a verr impertect and dirty C0-
IOur. Whereas it the thin body or Fmall particle be
much denter than the ambient medium, the Colours
accordins to the Tgth Oblerration are (o little changed
by the variation oF obliquitr, that the rars irtrich arc
refected least obliquelr may predominate over the rest
(0 much a5 to cause a heap ot luch particles ta appear
verr intensr of their COlOUr.
It conduces alio fomethinq to the contirmation ot this
Propohtion, that, accordins to the 22th Oblerration,
the Colours exhibited bythe denser thin bodr within
thecarer, are more brisque than thole exhribited by the
rares wrichin che denter.
PROP. VII.
The bioness of the component parts of naturat Bodies
may he conjectured by their Colours.
FOr lince the parts of these Bodies by PrOD. 5. d0
most probablr exhribit the lame Ciolours with a Plate ot
equalthichnels, provided they have the lame recractire
dentti; aud lince their parts leem For the most part 10
have much the lame densuy with Water or Cta(S, 45
by many circumstances is obrious to collect; to deter-
mine the sres oFthole parts you necd onsy hare recourle
to the precedent Lables, in Wrhich the thicknels otWa-
ter or Cilals exhibitins ans Colour is expressed. Thus
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