# Leibniz Legible — https://leibnizlegible.com
# Page: https://leibnizlegible.com/page/1677894601:0076
# Permalink to this reading: https://leibnizlegible.com/page/1677894601:0076?run=74
# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 66, page id 1677894601:0076
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=76
# Source image: https://digitale-sammlungen.gwlb.de/content/1677894601/jpgs/default/00000076.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 34 lines, status machine
# Lines: 34 recognised, mean confidence 0.90
# 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.

oned the wtole leneth at che Colours noc o be chenhole
lorsch oEche Spectrum, buc ihe lensch ot its rectilinear
Tides, (0 complerins chesomicinlar Fnds inco Circles, ivhen
cicher of che obserred Colours Fell michinthole Circles, 
mealured che distance et cac Colour srom che Find of che
Spoctrum, and subductins halethe distance trom che mea-
sured distance ot che Colours, L cook che remainder FOr
cheir corrected distances; and un chese Obserrations sec
donn chis corrected diltance for che difference ot cheir di-
Aances From. che Lens. For asthe lenorh ofthe rectilincar
sides of che Spectrum nvould bethe whole lenochi oF all che
Colours, Wvere che Circles of ntich las ve Chemed) chat
Spectrum consilts contracted and roduced ro Physical
Poines, Co in chac Cale chis corrected distance rould be che
real distance ot che oblerred Colours.
Wten cheretore L Furcher obserredthe deepestsensible R ed,
and chac Blue irhose corrected distance trom ic i2s  ParES
oFche lensch oE ohe rectilinear sides of the Spectrum, the
difference oF che distances ot cheir Foci trom che L ens Wvas
abOuc 8 Inches, ana 25 7 10 12 (0. 153 1053
When I obserred che decpest sensible Red, and chat Indi-
∞o nhole corrected distance ras = Or = oF che lenoch of che
rectilincar Cides of che Spectrum, che ditterence ot the di
sances of cheir Foci From che L ens, mas abour z2 luches,
and 25 2 10 3. (0 15 3:- 10 55.
When P obserred che deepest sensible Red, and chac deep
Indigo nhole corrected distance trom one anocher was = Or
ot che lengch of the rectilincar sides ot the spectum, che
difference ot the distances of their Foci tromthe L ens Was
abouc 4 Inches; and 25 3 20 4 (O is A EO 5
Wtien I obserred che deepest sensible Red, and chat part
of che Violet next the Indiso hole corrected distance trom
he Red Was Ox s oF che lenech oEche rectilinear sides ot
che