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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 128, page id 1677894601:0148
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=148
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move trom the point B, continually eill ic come tOL,
the Arch OF will firs increase and then decrease, and
(0 will the AnelC AZR erhich the caYS AN and CTR
contain; and the Arch OF and AnOlC AX R will BC
Bisoes irhen ND iS EO CN aS V II RR EO VZ RR,
in erhich case NF ill bCtO ND a5 2R +oI. AIOthe
Anele A YS irhich the rayS A N and IIS contain rill
Trst decrease, and then increase and sior least irten
ND iS EO C N aS V TI-RR EOVB RR, in wrhich cale
NVF. Will bC EOND aS ZR tOL. And Cothe Anole irhich
the next emersent ray (that is, the emersent ray aftei
chree rellexions) contains with the incident pay AN
will come to its limit Wrhen NDis to C. N aS V II. RR t0
VISRR, in Wrhich case N F will bC EO ND a5 4 R t0 ,
and the Ansle irhich the ray next alter that emergent,
that is, the rar emersent alter tour rellexions, con
tains rith the incident vill come to its limit, wrtren
ND is tO C. N, AS VTTRR tOV 24 RR, in irtrich case
NF will BC tO ND aS SR toI; and (0 on intinitel,
thenumbers 3, 8, 15, 24, Dc. beins gathered by conti.
nualaddition ofthe terms oFthe arithmetical progression
3,5,7,9,5c. Thetruth oF all this Mathematicians will
Catly examinc.
Norr it is to be obserred, that as wrhen the Sun comes
tohis Propicks, dars increale and decreale but a very
little for a great Wrhiletogether; Po wrhen by increat.no
the distance C. D, these Anoles come to their limitsu
ther vary their quantiey but very little For Pome time
together, and theretore a tar greater number oFthe rayS
irtich Fall upon all the points N in the Ouadrant
BL, Mall emerse in the limits oF these AnSleS,
then in auy other inclinations. And Further it 1
te