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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 129, page id 1677894601:0149
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L129
tobe observed, thatthe rars irhich ditter in retransi.
bilies rilthare different limits oftheir Ansles oE emer-
sence, and by consequence accordins to their different
degrees oFretransibilitr emerse most copiously in dif-
terent Angles, and beins separated from one another
appeas each in their proper C Olours. And wrhat thole
Ansles are may be easils sathered trom the FOregOInO
Lheorem by computation.
For in the least retransible raysthe sines Land R (a5
ras found abore) are 108 and 8r, and thence by
computation the grentest Anole AZR ili be tound
42 desrees and 2 minutes, and the leal Ansle AYS,
50 degr. and 57 minutes. And in the most retransible
rays the sines I and R arc 109 and BT, and thence by
computation the greatest Ansle AZ R vill bC Found
Odeorees and 17 minutes, and the Least Ansle AYS
54 desrees and7 minutes.
Suppolenon that isthe Spectator SFre, and OP a line Fig. 15.
drarn parallel to the Suns rars, and let POF, POF,
eOC, POE, be Ansles oF 40 desr. 27 min. 42 degr.
2 mIn. 50degr. 57 min. and 54 desr. 7 min. relpectirels,
aud chese Ansles turned about their common side Ol,
Mail rith their otlier sides OF, OF; OCi, OHI de-
deleribe the veroes of tro Rain- bOWS AFBF and
CHIDC. For iF H, F, G, II, bc DropS placed any
arhere in the conical superticies described by OF, Ol,
OG, OTI, and be illuminated by the SunS raYS SF
SF, SG, SHI; the AnslC SFO beins equal to the
Ansle POF or 40 degr. 17 min. CalI DC che sreatest
Anele in wrhich themost retransible rays can atter Onc
cellexion De retracted to the fiy e, aud cheretore all che
Drops in che line O F. Mall send che most retransible
1+γ4