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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 26, page id 1677894601:0036
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place Y eo which ic cended betore Retraction; and there-
Fore suffered a5 well in che Airst Prilm as in che second à
oreater Retraction chan the rest of che Lighe, and by con-
lequence was more Retransible chan che rest, even betore
its incidence on the Arst Prilm.
Sometimes I placed a chird Prilm atcer the lecond, and
Cometimes also a Fourth atcer che chird, by ait irhich che
Imagc miohe bc otren retracted sidermars: buc che Rays
erhich ivere more retracted chan the rest in che Airst Prilm
ivere alsomore retracted in aIl the rest, and chac without
any Dilararion of the lmage sidemars: and cheretore thole
Rars For cheir constaner ot a greater Retraction are de-
serredy repured more Retrangible.
ie. 15. Buc chac che meanins of chis Experimene may more
cleartr appear, ic is to be considered chac che Rays wtrick
are cquallr Retransible do Fall upon a circle ansivering to
chesuns Disque. For this iras proved in che chird Experi-
ment. By a circle I understand noc here a pertect Ceo-
metrical Circle, buc any Orbicular Figure whose lenoth is
equal ro its breadeh, and wrhich, as to sense, mar scem
circular. Let cheretore AO reprelent the circle wrhich all
che most Retransible Rays propasaced trom che whole
Disque ot the sun, vould illuminace and paint uxon the
oppolice Wall it chey vere alone; LL che circle which aI)
the least Retranoible Rars ould in like manner illuminare
and paine it cher irere alone; BHI, CT, DR, che circles
wrhich (o manx intermediare Pores ot Rars rould succel-
hvely paint upon che Wall, it cher iere linglr propasaced
trom the sun in succeltire Order, che rest being alivars in-
tercepted; And conceire chac there are other intermediare
Circles rithout number irtrich innumerable ocher incer-
mediare Corrs ot Rays ould successirely paint uxon che
nall it che sun Chould succetsirely emic erery POrE aparE.
And