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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 86, page id 1677894601:0106
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Pothese Fxperiments may be added the tenth FX-
periment oE che tirst B0ok, Wrhere the suns Light in a
dark Room beins trajected throush the parallel superti-
cies oftiro Prilmstied together in the form ot a Paral.
lelopide, became totally ot one unitorm vellor or red
COlOur, at its emergins out of the Prilms. Hlere, In
the production ot these Colours, the contine oF Madon
can have nothins t0 do. Forthe Lisht chanses FrOM
Wrhite tovellor, oranse and red successirely, rithout any
alteration oEthe contine of strador: And at both edges ot
theemergins Lisht irhere thecontrary contines oF Ma-
dorr ousht to produce ditterent efects, the Colour 15
one andche Came, Wrhether it be rrhute, sellorr, oranse
or red: And in the midale ot the emersins Light,
artrere there is no contine ot Mador at aIL, the COIOUE
i5 the very lame a5 at the edges, the Wtrole Lioht at its
very tirk emergence beins ot one unitorm Colour, irhe
cherwrhite, vellor, oranse or red, and goins on thence
perpetually richout ans chanse ot Colour, cuca a5 the
contine ot strador is vulsarty suppoled to worke in ie
Fracted Lisht alter us emergence. Ncither can thele
Colours arise trom any new moditications ot the Light
by retractions, becaule they chanse successirels trom
Wrhitetorellor, oranse and red, rrhile the retractions
remain the same, and allo becaule the retractions are
made contrary rays by parallel superticies wrhich de-
Aroy one anothers effects. Lhey arile not theretore
trom ans modifications oF Lishe made by retractions
and Chadors, but hare Lome other cause. What that
cause 15 ive ered abore in this tenth Lixperiment,
and need not here repeat II.
L. DetC