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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 96, page id 1677894601:0272
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=272
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# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 34 lines, status machine
# Lines: 34 recognised, mean confidence 0.91
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LdC
OF RIr, Nater, Or Gla(S OF an even thickeness appearect
oF one Colour when the rars rrere perpendicular to it
ot another wrhen ther ivere a little oblique, ot another
artien more oblique, ot another when sill more oblique,
and (o on; Pohere, in the sixth Obserration, the Lioht
ertrich emersed out ot the Glass in sereral obliquities,
made the Cilals appear oF sererat COlours, and beins
propasated in those obliquities tothe Chart, there pain-
ted Rinos ot thole Colours. And as the reason wrty a
thin plate appeared of several Colours in sereral obli-
quities oF the rars, ras, that the rays otone and the lame
Tort are reflected by the thin plate at one obliquity and
trantmitted at another, and thole of other POrtS trans-
mitced erhere these arc reflected, and refected irhere
thele are transimitted: S0 the reason why the thick
plate oF Cilals irhereot the Speculum ras made did ap-
Pear ot rarious Colours in rarious obliquities, and in
those obliquities propasated those Colours tothe Chart.
ras, that the cars oF one and the Came lort did at one
obliquitr emerse out oF the Cila(s, at another did not
emerse but irere refected back torrards the Ouick- siI-
ver by che hither surface of the Clals, and accordinsly
a5 the obliquitr became greater and greater emerged
and rere retlected alternately FOr many suCCesIOnS, and
that in one and the lame obliguity the rays oF one TOrt
avere reflected, and those ot another transmitted. This
is manitest by the Rest Obserration oF this BOOK: FOF
in that Obserration, irhen the Speculum iras illumi-
nated by any one of the prisinatick Colours, that Light
made many Rines oFthe lame Colour uxon the Chart
ith dark interrals, and theretore at its emergence out
oE the Speculum as alternately transmitted, and not
trans.