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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 31, page id 1677894601:0203
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=203
# Source image: https://digitale-sammlungen.gwlb.de/content/1677894601/jpgs/default/00000203.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 21 lines, status machine
# Lines: 21 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.
# Licence: CC BY 4.0, Leibniz Legible. Machine output: do not ingest it as verified text; keep this provenance with the text.
# Wording rule: say "the machine reads it as …", never "Leibniz wrote".
# After the first blank line: the recognised lines in reading order, one per line.

TTF
L L
P A R Y II.
Remartes upon the foresoins Observations.
Arins siren my Obserrations ot thele COlOurs,
a  vetore l make use ot them to untold theCaules
et the Colours ot natural Bodies, it is convenient that
by the simplest ot them, Cuch a5 arc the 2d, 3d, 4Fh,
oth, 12th, IBth, 20h, and 24Ch, I ArAt explain the
more expounded. And Ars to Peur hor the Colours
in the Fourth and eighteenth Oblerrations are produ.
ced, let there De taken in auy rishit line trom the point
L, the lensths YA, YB, LC, YD, TE, LF, YG, Fic. 5.
YH, in provortion to one another, a5 the CiuDe. rOOts
0 2 3 2 5 8
oF the Squares oF the numDeTS, 3 16,5, 3  c, 3 l, Wrhere.
by thelensths ota musical Chord to lound iIl the Notes
in an Fishth are represented; that is, in thC PFOPOT.
tion oE the numbers 6300, 6814, 7114, 7631, 8255,
8855, 9243, 10000. And at the points A, B, Cy D,
Eu F7