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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 88, page id 1677894601:0264
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=264
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# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 31 lines, status machine
# Lines: 31 recognised, mean confidence 0.92
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OB. S. L.
The Sun inins into my darkened Chamber chrouon
a TIOlC: Ot an Tuch vide, I let the intromitted beam
oF Light Fall perpendicularir uxon a Citals Speculum
oround concare on one lide and convex on the other,
toa Sphere ot Are Feet and eleren Tnches Radius, and
quicke- silrered orer on the conrex lide. And holdine
a Wrtrite opakce Chart, or a Juire of Paper at the Center
ot the Spheres toirhichthe Speculum ras ground, that
isqe at the distance ot about tive Feet and eleren Inches
from the Speculum, in such manner, that the beam ot
Lieht might pass throuch a little FTole made in the
middle oF the Chart to the Speculum, and thence be
reflected back to the lame HIole: I observed uxon the
Chart foux or fire concentric Trises or Rings oF Colours,
like Rain-Bows, encompassine the HIole much atter the
manner that those, irhich in the Fourth and tollowins
Obserrations ofthe tirst part of thisthird Book appeared
Detireen theObject. Cilalles, encompased the black SpOt,
buc vet larser and fainter than those. Thele Rings a5
ther srer larser and larser became diluter and Faintei,
10 that the tifth iras scarce vitible. Vet lometimes,
irhien the Sun Mhone very clear, there appeared faint
Lincaments ot a sixth and seventh. IF the distance ot
theChart trom the Speculum as much greater or muctu
lels than that oF six Fcet, the Rinss became dilute and
vanismed. And il the distance ot the Speculum From
the Windon as much sreater than that oF six Feet,
the rertected beam or Light rould De lo brond at the
distance oF six Feet trom the Speculum erhere the Rings
appeared,