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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 118, page id 1677894601:0138
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PROP. VII. THEOR. V.
Al the Colours in the Oniverse rehich are made by Fiehbu
and depend not on the porver of imacination, are
either the Colours of homoseneat Pishts, or compoundec
of these and that either accurately or very nearly, ac
cordine to the Rule of the feresoine Problem.
For it has been proved (in Prop. I. Lib. 2.) That the
changes oF Colours made by retractions do not arilé
trom any new modifications of the rays imprest by thole
retractions, and by the various terminations ot light
and Mraco, as hasbeen the constant and general Opi
nion otPhilolophers. Ithas allo been proved that the
sereral Colours ot the homogeneal rays do constantl)
antiver to their degrees ofretransibilitr, (ProP. I. F ib. 1.
and CrOD. 2. F ib. 2.) and that cheir desrees ot retransI
bilies cannot be chansed by retractions and reflexions,
(PrOp. 2. Lib. 1.) and by consequence thât thole their
Colours are likerile immutable. It has allo been pro.
ved directis by retractins and reflectins homoseneat
Lishes apart, that their Colours cannot be chanced,
(PrOP. 2. Fib. 2.) IE has been proved al(o, that wrhen
the sereral Corts ot rars are mixed, and in croctins pals
throuoh the lame space, ther do not act on onc anothei
l0 a5 to chanse cach others coloritick qualities, (L. Xper.
10. Fib. 2.) Dut by mixins their actions in the senlo
rium beget a lenlation difterins trom irhat cither rouid
do apart, that is a senlation oF a mean C. Olour Betreen
racir proper Colours; and particularly erhen by che
concourse and mixtures oF all Corts ot cays, a wrhite
COlOus