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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 101, page id 1677894601:0277
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=277
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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 0.91
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CTOT
it the obliquities of the rays to the concare Turtace ot
the Citass De luch thac cho sines oE their retraction I
passins out oE the Cilass throuph chac Curtace into the
AIr BC 2172, 7659, 2031, 2345, chebrishe Light ot
the 3438bch Rins Mall emerse at thechicknesses oF the
Ctals irtrich are to = ot an lnch 45 34386 10 34385,
34384, 34383, 34382, respectirely. And theretore it
the chicknels in allFhele cales be=OF an lnch (a5 it 1S in.
the Cilalo oFirtich the Speculum was made) thebrishe
LiohtoF che 34385th Rins Mall emerse irhere the line
OFretractionis 1172, and that oF the 34384Fl, 384383t
and 34382Fh Rins wrhere the (inc 15 1659, 203.1, a1d.
2345 respectirey. And in thele Angles oF retraction
che LishoF chele Rines MaIl be propasated trom the
Speculumto the Chart, and there paint Rinss about the.
Wrhite central round Spot oF Lighe wrhrich re laid wras
the LighE oF the 34386ch Rins. And the Semidiame
ters oF theleRinss Mall lubtend the Ansles ot retraction
made at the concare Curtace ot the Speculum, and by
consequence their Diameters MaM De to the distance ot
the Chart trom the Speculum as thole sines ofretraction
doubled are to the Radius chat 15 45 1172, 1659, 2031,
and 2345, doubled are t0 100000. And theretore it.
the distance of the Chart trom the concare surtace ot
the Speculum DC sIX Feet (a5 it ras in the third ofthele
Obserrations) the Diameters oF the Rings of this bright
vellon Lishe uxon the Chart MaII bC 1688, 2389,
2925, 3375 Inches: For thele Diameters are to6 Feet
as theaborementioned lines doubled are to the Radius.
Nor chese Diameters of thebrighe vello RingS, thus
tound by computation are the very lame with thole
tound in che chird otthele Oblerrations by mealurins
cMCM.