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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 132, page id 1677894601:0152
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=152
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# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 33 lines, status machine
# Lines: 33 recognised, mean confidence 0.91
# Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German.
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olen their Colours appear RronS and perfect. FOF
once, br luch means a5 I then had, I ineasured thc
srcatest Semi-diameter otthe interior Tris about 12 de
crees, the breadth ot the red, vellor and sreen in that
lris 63 or 64 minutes, behdes the ontmos faint red ob
Ecured by Brightness oF the Clouds, For wtrich ire
may alloir 3 or q minutes more. The breadeh oF the
Dlue ras about 40 minutes ore besides the violet,
ertich ras Fo much obleured by the briohtnels oF thC
Clouds that I CouId nOE meature itS BrCadE. BUF
suppolins the breadth of the blue and violet together
to equal that ot the red, vello and sreen together, the
Wrhrole breadth ot this lris wisl be about 2 degrees a5
abore. The least distance betreen this Tris and the ex
terior Tris ras about 8 degrees and z0 minutes. The ex
terior Iris Was broader than the interior, buE (0 Faint,
especially on the blue ide, that L could not mealure its
breadtm distinctlr. At another time When BOTH BONS
appeared more distinct, I measured the breadth oF the
interior Tris 2 gr. 10, and the breadth of the red, vel
lorr and sreen in the exterior Iris, Wras to the breadt
otthe lame Colours in the interior 25 3 t02.
This Fixplication oE the Rain- BoW is vet Further con
tirmed by the kenovn Fxperiment (made by Antonius
de Dominis and Des-Cartes) ot tranging up any Where
in the Sun- hine a CiL IIS-Clobe filled rith Water, ane
riemins it in such a posture that the rays wrhich come
From the Globetothe tre may contain rith the Sun
cays an Angle oF cither 42 Or 50 degrees. For il the
Ansle De about 4.2 Or 43 degrces, the Spectator (suj
Dose at O) Mail sec a tuit red Colour in that side oF tH
Globe apposed to the Sun as tis represented at f
an