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Opticks 1717 - Up

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[ 283 ]<br />

n&Y 1c-J. When the beam of the SLlIl’S Z,$)f.<br />

qqs refldkd back from the SpecuIu:n nor direi;tIy<br />

to K~C hole in the \Vindo\\~, but to a plllco<br />

a Iit Lie dil’rant from it, the common cfmte’l ()f<br />

that Spot 3 alld of all the Rings of‘Cc)loul*s fell<br />

iI1 the middle \v;ts; bet\\;een the beam of tllc il;-<br />

,cident Light 9 and the beam of the r&&g<br />

Eight, and by confequc~m in the ccntcr of tjlc<br />

Q7licrical COncavit\r of the !$kculun~, \\rhencver<br />

the Chart on which the Rings of Color-s fell<br />

t\.as placed at that center. And as the beam of<br />

ref-Med Light by inclining the Syecululn receded<br />

more and more from the beam of in&<br />

‘dent Light and from the common center of the<br />

colour’d Kings between them, chok Rings gr~<br />

bigget and bigger, and i‘o alib

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