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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 27, page id 1677894601:0037
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=37
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And seeing the Sun emies all chese sOrES ac oncC, chey must
all cogccher illuminace and paine innumerable equal cir-
cles, oF allirhich, being according eo cheir degrees oF RC-
Fransibilier placed in order in a continual series, that ob-
lons Spectrum P P is compoled irhich I delcribed in the
chird Experimene. Nou it che suns circular Image Y
irtrich is made by an unrefracted beam ot Lighe was by
any dilatation ot che single Rays, or by anr ocher irregu-
larier in the Retraction ot the Arst Prilm, conrerted into
che Oblono Spectrum, P V: then oughe erery circle AO,
BII, C J, exc. in thac Spectrum, by che crols Retra-
ction ot che second Prilm again dilatins or ochermile
Scarrering che Rays as before, to be in like manner drawn
ouc and eranstormed into an Oblons Figure, and chereby
the breadch of the Image P P ould be no as much aug-
mented as the lenoth ot che Imase Y was betore by che Re-
Fraction ot the first Prism; and chus by che Retractions ot
boch Prisms cogether ould be formed a Foursquare Figure
pr +7 25. I described abore. Wheretore Cince the breaden ot
the Spectrum P T is noc increaled by che Retraction Side-
Ways, ic is cerrain chac che Rays are noc split or dilaced, Or
ochermars irregularty scacrered by chac Retraction, buE
thac erery circle is by a regular and unitorm Retraction
eranclate d entire into anocher place, as che circle AC by
the oreatest Retraction into che place ag, the circle BII by
a lels Retraction inco the place bh, the circle CF bY 2 RC-
Fraction sill less inco the place ci, and 50 oF che rett; by
Which means a nem Spectrum pt inclined co che FOrmer
D T is in likce manner compoled ot circles lyins in 2
riohe Linc; and these circles must be ot che same bignels
rich the Former becanse the breadths ot aII che Spe-
Arums Y, P T and pF ac equal distances trom the Prisns
are equal.
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