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.<br />
&wt’ of the Glaffe<br />
Circles appear?c$~<br />
fo thht all the (2olourk inight be fucceilively rel<br />
fleAed fr+i th Circles to my Eye whilit I held<br />
it immovable 9 found the Circles which the<br />
ked Light’ mRde to be mallifeitly bigger than<br />
+ofe which were made by ‘the blue and violet,<br />
And it was very pleafanr to fee ‘them gradually<br />
&vell or contra& accordingly as the CC$?LW of the<br />
Light was changed. The Ii~terval cpf the G-l&<br />
f,s at any of the Rings when they MT~‘C made<br />
bjr the utmoiYred Liglit, was to their htcrval<br />
at the fame .aing when made by the utmoit<br />
violet, greatc$ than as 3 to 2, and IeG than as<br />
‘13 to’% By tl$e moit of my Obfcrvations it was<br />
as I4 tq g* And this Frogortion kern’‘’ very<br />
qearly the @me in all Obliquities of ,111y Eye ;<br />
xlnlefs w.ben two Prifms we1’e made” ufe of intiead<br />
c$ the Obje&-gla[Tes. For the.* at ;I cerd<br />
tain great qbliquity of mjr Eye, the Rings’ina+<br />
by the @Vera1 Colqurs feem’d equal, and at q<br />
greater obliquity th$e made by the violet wquld<br />
be greater than the &me Kings. made by the<br />
ped : the RefraAion of the Prifm in this ,cafe<br />
caufing the moit refiangil$e Rays to falk morC<br />
pbliquely on that plate of the Air than tile 1eaiE<br />
kefrangible ones. Thus the Experkncnt li!c-<br />
@eded in the colour’d Light ) which was fufgciently<br />
Arqng and copious. to make the Ri6gs<br />
;fenfible, ’ And thence,it may be gather’d, that<br />
sf the moPE .WIrangible and leait r~~rangi,ble Rays<br />
bad been c’opiops enough to make the Rings<br />
knfible- withgut ,the mixture sf other Rays, the<br />
proportion ‘%hich her&was 14 to 3 would have<br />
peen , a little greater; fuppofs: I& or I& to 3.<br />
I./: . :: @Jf
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