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Opticks 1717 - Up

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2g* I<br />

~fic*mpdIed ; that ii to fiy> Ghe whit&<br />

Spot in the m le of thofe Rings was now ,become’s<br />

white ing equal to the f-kit of thofe<br />

bright Rings, and the Grfi of thofe bright ones<br />

was now become equal to the fecond ‘of thofe9<br />

and ib Oil. ISor the Diameters of the white<br />

Ring, and of the other luminous Rings encomA<br />

paRing it, were now I;;, 24, a+;, 3.& @k-. or<br />

tlx!reaboLlts.<br />

~\‘hen the difhCC Qf tile ~&II beallX Of<br />

Light at the Chart was a little more iricreafed,<br />

there enlergcd out of the middle in order after<br />

the redi a purple, a blue, a greenj 2 ~~~~~~~~<br />

and a I‘ed inclining much to purple, and whelm<br />

the COIOU~ wx brighteit king between ye110 w<br />

and red, the former indigo, blue, green, yellow<br />

and red, were become au Iris 0~ Ring of<br />

Colours equal to the firit of thofe luminous<br />

Rings which appeared in the four lirfi Obfervatrons<br />

9 and the white Ring which was now<br />

become the fecond of the luminous Rings was<br />

grown equal to the fe~ond of thofe, aud the<br />

ME of thofe which was now become the third<br />

Ring w’a5 becon~e equal to the third of thofe,<br />

Nld fo On. ITor their IXuneters Were I-S, 2+,<br />

Z-I-;, 3: IIXZ~KS, the difkxnce of the two beims<br />

of Light, and the Diameter+of the white Ring<br />

being 24 Inches.<br />

Wheil there two beams bccatne more diitnnt<br />

there eruerged out of the middle of the purplifll<br />

red, firit: a darker round Spot, and then<br />

out of the middle of that Spot a brighter. And<br />

now the former Colours (purple, blue, green,<br />

yello~,~ and purplifh’red) acre become a Ring<br />

Npl

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