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the, c&itrajyy’ Way, fE rcfiangible Rays<br />
might be ~nork copious in the refl&ed Light<br />
than the refi, and the Whh@? tLllIX?d fuc-<br />
, ~&ively to ‘yellow, orange and xd.<br />
Lafily, I made an hitruinent Ilk” in fafhiolj<br />
of g Comb, whofe Teeth being in number fix-.<br />
tee11 were aboui: an Inch and an half broad, and<br />
the Intervals of the Teeth about: two hx%es<br />
‘tT7ide. Then by interpofing fuccefiively the.<br />
Teeth of this Infirument near the Lens, I intercepted<br />
part .ofi the Colourb by the interpokd<br />
Tooth, wliilf,? the refl of them went on through<br />
the interval of the Teeth to the Paper JUI’E, alld<br />
there /painted a round folar bnage. riiut the<br />
Paper I had firft placed fo, that the Image might<br />
appetir white as often as the Comb was tnlcell<br />
‘awry ; and then the Comb being as was faid interpofed,<br />
that whitenefs by reafbn of the intercepted<br />
part of the Colours at the glens did al-<br />
I ways change into the Colour compounded of<br />
thofe Colotirs which were not intcrccptcd, and<br />
tliat Colour was by the motiou of the Comb<br />
petually varied i’o, that in the paiIing of every<br />
0th over the Lens all theft Colours, ml,<br />
ycll.ow, green, blue and purple; did almys ILKcec(l<br />
01x2 another. I canfcd thcreforc all the<br />
Teeth to pab fuccefivel y’ over the Lms, and<br />
x+cn the Motion was ilow, there appeared a<br />
perpetual fuccefion of the Colc~urs upon the 1<br />
I%pes : But if I fo much acceleratqd the ,&lotion,<br />
’ that the Colours by r&on of their quick<br />
fUcccfGon could not be diitinguiflied from one<br />
mother, the app~arancc df the fingle Colours<br />
~-mr~!~~. There w;1s 110 rcyj > 110 y&)w ) 110<br />
green,
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