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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 95, page id 1677894601:0271
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=271
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L9G
as it did uxon my Fye, the Came Colour alvays aP.
Pearins to a By. Rander upon my Leyc irhich to me ap-
Peared upon the speculum. And thence PHner that
the RingsoFColours upon the Chart irere made brthese
reflected COlours provasated thither from the Specu-
lum in sereral Angles, and that their production de-
pended noc upon the termination of Lisht and Shad-
dor.
OB5. VII.
By the AnalosY oF alI these Phaenomena With thole oE
the like Rinss oF Colours described in the trst Part oF
this Book, it scemed to me that these C OlOurS were
produced by this thick plate of Clals, much alter the
manner thac thole vere produced by very chin
plates. For, upon trral, I Found that it the Ouick-
lilrer vere rubbed off trom the back- side ot the Specu
lum, the Class alone ould, cause the Tame RiInsS Ot
Colours, buc much more faint thanbetore; and there.
tore the Phaenomenon depends not upon the Cuick-
Elver, untels Cotar as the Duiek-silver by the increa(in
the reflexion oFthe back. side oF the Cilals increales the
Light oF che Rings oF Colours. Ltound also that a SPC.
culum ot metal rithont Cilals made lome rears lince
for opticalules, and very ell irousht, produced none
OF thole Rings; and thence L understood that thele
Rinss arise not trom one specular surtace alone, but
dependupon thetro surtaces ofthe plate ot Cilass Wrhere,
oFthe Speculum ras made, and upon che chicknels ot
che Cilais betireen them. For a5 in the7th and T9th
Oblerrations oE che tirst Part oE this B0ok a chin plate