# Leibniz Legible — https://leibnizlegible.com
# Page: https://leibnizlegible.com/page/1677894601:0031
# Permalink to this reading: https://leibnizlegible.com/page/1677894601:0031?run=74
# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 21, page id 1677894601:0031
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=31
# Source image: https://digitale-sammlungen.gwlb.de/content/1677894601/jpgs/default/00000031.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 34 lines, status machine
# Lines: 34 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.
# 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.

che Prims makie any: For in a Vessel made of polistrec
Plates oF Class cemented cogether in the Chape ot a Prisir
and Alled wich Water, chere i5 che like SuCCeIS OFFMC FX-
periment according co che quanciey ot che Retraction. IE
is furcher co be obserred, chat che Rays vene on in riohe
Lines trom the Prism eo che Image, and cheretore ac cheir
very going out ot the Prilm had all chac Inclination eo
one anocher trom irhich che lenoch ot the Image pro-
ceeded, chat is the Inclination ot more than tro DCorces
and an haIt. And vec according to the Lars oF Opticks
vulsarty receired, they could noc possibly be lo muchi in-
clined to one anocher. For let FO reprelent cheWindon- Fir. 13
PhuE, F che hole made cherein chrouxh irtrich a beam of the
Suns Lighe as transmitted inco che darkned Chamber, and
ABC a Friangular Imaginary Plane whereby the Prism is
seioned to bc cur erantrerllr chrouph the midale ot che
Lighe. Or il rou please, let AB C represene che Prism ic
selF, looling directly cormards che Spectators Eye wich ies
nearer end: And lec X Y b0 the Sun, MI N thePaper upon
irtrich ehe solar Image or Spectrum is cast, and P Y thc
Image ic selF whose sides corrards V and W are Rectili-
near and Parallel, and ends corrards P and T Semicir.
cular. YKTIP and ZL F T are thetro Rays, the ErA
ot which comes from che lorver part ot the Sun co. che
higher part of che Image, and is retracted in the Prilm ae
K and II, and che latrer comes from the higher part ol
the sun eo che lorver part ot che Image, and is retracted
aEL and J. Since the Retractions on boch sides the Prilm
are cqual co one another, thac is che Retraction at R equal
co the Retraction at T, and che Retraction at L equal EO
che Retraction ac FI, (0 chac che Retractions ol the inci-
dene RaYS ac K and L taken together arc equal to che
Retractions oF che emergent RayS ac II and J caken toge-
chex.