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q715ch 5211 upon the fecond Board d e was c&<br />
tl~r&gil cite hole g it went to a lom3 place 1VI<br />
ofi the Vbiall, and u7hen the higher part of tlint<br />
Light ms cdl through the fame hole p3 it went<br />
to 8 higher place on the Wall, and vGxn a-<br />
ny intermediate part of the Light was caiE<br />
t-hrough that hclc it went to fonie place on the<br />
Wall between iVI and N‘. The unchanged Po-<br />
‘iition of the Holes in the Boards, made the Imcidence<br />
of the Rays upon the f’econd Prifm to<br />
be the fime in al1 cafesl And yet in that coinrnoll<br />
Inciderrce Come of thckqs were more K-<br />
fra&d and crthcrs Ms. And thofe were mor,e<br />
refix&cd in this Pi-ifin u711ich by a greater WefraAion<br />
in the fir0 Prifnl were more turned<br />
out of the R7Pj', and therefore for their coniitancy<br />
of being more refk&ed are defervedly<br />
cai.leh more refrangible.<br />
Exp. 7. At tv,:o holes tnade near one anothcr<br />
‘in my \)%ldow-fflut I placed wo Pl?ii~,<br />
me at eit& phi& migllt calt ~rpon he op~.miite<br />
Wall (after the manner of the third I!,x~~x--<br />
&mm) two oblong colonred Images of the<br />
SLIll. And at a little diikmde from the ‘Wall I<br />
,@laced a lmg k~Aer Paper with It-raight and<br />
-parallel edges, ,and ordered the Pri.ftns and Paper<br />
i‘o, that the red Colour of one Image might<br />
fall dirc&ly rapcm one half of”the Paper, and the<br />
violet Colour of the qther Image upon the o-<br />
ther half of the fame Paper; 1’0 that the Paper<br />
appeared of two Colours], red and violet,<br />
nluch after the manner of the painted Paper<br />
in the firit and fecond Experiments. Then<br />
~jt1~ a %latk Cloth I covered the W,all behind<br />
De<br />
( t!a?
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