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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 11, page id 1677894601:0183
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=183
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B
CII
MCanS 1e 17oc 17000 C. Deins is thieknesses at the
duxkest parts oF aIl the dark Ones.
OBS. VII.
The Rings vere least wrhen my Fye iras placed per-
pendiculariy over the CElases in the AXis oF the RinoS:
And irtien l vierred them obliquely ther became big
Ger, continually (velling as P remored my fre Further
trom ehe AXis. And partly by meaturine the Diameter
oE the Came Circle at sererat obliquities ot my Eye,
Partly by other means, 25 also by makcins use oF thc
to Prisins For very sreat obliguities. IFoundits Dia-
meter, and consequenelr the thickness oF the Air at its
Perimeter in alI those obliquities to be rerynearly in the
proportions expressed in this Pablc.
Angle of Tn- I Anele of Re- 1 Diameter of (Thickness of
cidence on the fraction into the Rine.
Air.
the Air.
de5. min.
00 00 00 00
TC
06 26 10 00, 10;
12 45 20 00 10-
18 49 30 00 103
24 30 40 00 113
29
50 00 127
33 58 60 00 14
35 47 65 00
3
38
39
15.
19 70 00 163
335
75 00
27 80 00
19
227
40 00 85 00 29
40 1Y 90 00
ibe Air.
1
TO1
10
L
32
20