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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 104, page id 1677894601:0280
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=280
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104
butcheir chickness, the Diameters oF the RinOS arC re-
ciprocallr in a lubduplicate proportion oFthe thickneses
oF the plates. And this Phers sufficiently that the Rinss
depend on Both the Turtaces ot the GElaIS. Thev de
pend on the conrex surtace because ther are more lu-
minous when that Furtace is quick-silvered over than
ertren it is without Ouick-silver. Ther depend aI(0
uvon the concare TuTFaCe, because Writhout that lurtace
a Speculum makes them not. Ther depend on Both
surtaces and on the distances betmeen them, because
their bioness is raried by varving only that distance.
And this dependance is of the same Kind with that
artrich the Colours et thin plates hare on the distance
OF the TUIEFaCeS OF those plates, because the bione(s
OF the Rings and their proportion to one another.
and the variation ot their bigness ariling fromthe raxiz
tion oF the thickness oF the Cla(S, and the orders ot
their ColOurS, is such as ought to retult From the PLopo-
Stions in the end oF the chird Part ot this Book, derired
From the the Phaenomena of the Colours of thin plates
set donn in the ArA Part.
There are yet otter Phaenomena oF these RingS OF
COlOurS DuE Fuch as Follo From the same Propostions.
and theretore contirm Both the truth ot thole PropOsi
tions, and the Analoey betireen these Rings and tne
Rinos oF Colours made by very thin plates. I MaII
Fubjoyn some oF them.