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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 63, page id 1677894601:0073
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=73
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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 0.92
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heterogeneous Rays trom one anocher by che Mechod I de-
scribed in the iich Experiment, (0 a5 co make a coloured
Spectrum abouc ervetre or sitccen cimes longer than broad.
This Spectrum I cast on 2 princed b0ok, and placing che
aborementioned L ens ac the distance ot sIX Fect and an
Inch trom chis Spectrum o collect che Species ot che illu-
minated Letrers ax the same distance on the ocher (ide, L
found chac the Species of the Lerrers illuminated with Blue
vere nearer eo the Lens chan chole illuminated wich decp
Red by abour chree Tnches or threc and a quarter: buc the
Species oF the Leccers illuminated wich Indiso and Violet
appeared so contused and indistinct, chac I could noc read
chem: Whercupon vieming che Prilm, I Found ic ras full
oF Veinsrunnine from one end ot che Clals to che ocher;
Cochac the Retraction conld nor be regular. Itook ano-
cher Prilem cheretore ertich as trec trom Veins, and in-
Cead oEthe Lecters Puscd erro or chrec Parallel black Lines
2 lierle broader chan che Aroakes of che Letters, and cast-
ins che Colours upon chele Lines in luch manner that the
Lines ran along che Colours from one end of che spectum
co the ocher, l Found chac che Focus wrhere che Indico, Or
contine ot ehis colour and Violet cast the species of che
Black Lines most distinctly, cobe aboue + Tnches or 1 near-
er to the Lensthan che Focus where the decpest R ed cast
the Species ot che lame black Lines most distinetr.
Phe violet mas (0 fainc and darke, chac I could nOc
discern che Species ot che Lines distincty by chac Co-
tour; and cheretore considerins thac the Prism was made
ot a dark coloured Class inclinins eo Creen, L rook anocher
Pism ot clear Wrhice Cla(s; bur ehe Spectrum ot Colours
irtrich ehis Prism made had lone nhice Screams ot Faint
Liohe Chooring out trom boch cnds of the Colours, hich
made me conclude char Comethins ras amils; and viem-
in8