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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 92, page id 1677894601:0112
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=112
# Source image: https://digitale-sammlungen.gwlb.de/content/1677894601/jpgs/default/00000112.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 34 lines, status machine
# Lines: 34 recognised, mean confidence 0.87
# 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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# After the first blank line: the recognised lines in reading order, one per line.

E
one and che Tame Colaur and degree ot Colour From one
end ofthis line cothe other. L delineated cheretore in
a Paper che perimeter oF the Spectrum I A P GMI L,
and in tryins ehethird Fxperiment oE the APA BOOL, 
held che Paper s0 that the Spectrum mighe FaII upOn
this delincated Figure, and agree with it exactly, wrhil
an Asistant irhose Lyes For diltinsuithins Colours vere
more critical thanmine, did by ristt lines aB, 78u cl, 86
deawn crols the Spectrum, noce the contines oF the CO-
lours chat is oF thC red MIa BF OF FHC OTANOE a XA B. O1
the vellorr rc58, ot thegreencnde, oF the blue n2nDq
of the indico inux, and oF the violet n CFAH. And
chis operation beirss divers times repeated both in the
Tame and in sereral PapeES, I Found that the OB
Terrations agreed elt enough writh one another, and
thatthe rectilinear sides MI Ci and F’A vere by the Caict
crols lines dirided after the manner oF a mutical Chord.
L et GMI bC produced to Z, that M Z may bc equat
toGM, and conceire (Z, n Z,  Z, nZ, ck, Y2, aZ,
M Z, tobe in proportion to one another, a5 the num
DerS 19 57 89. 9 5 33 103 23 and (0 to reprelent the
Chords oF the Ker, and oE a Pone, a third MinOr, 2
tourth, a fitth, a lixth Major, a serenth, and an eighttr.
abore that Key: And the interrals M =, a7, YC, en, n1,
n, and. n Ci, Will. be the spaces Wrhich the several C0-
lours (red, oranse, vellor, oreen, blue, indico, riolet)
Take UP.
Nor chese intervals or spaces subtendino the difte
rences ot the retractions oE the rars soins to the limits
OF those Colours, That 15, to. The PoinEs , ag. 7, C 12, 2, (5,
may without any sentible Frror be accounted propor
tional to the differences oFthe lines oFretraction ofthole
1475