Opticks 1717 - Up

[ lwo~ .
x&sre the white&3k So if the violet, Hue
gnd gt’eeu be interkpted, the renlainiug yel-
I 0117, .opnge and ied will coinpo~~nd. up011 the
Paper ‘ail OTim& &l then if the intercepted
f2010ul-i be let I)& they will &tll upon this CQmpounded
orange, 2nd to@tll&’ wit11 it decor@
ound a wtlitc., so alfo if ihe, red and violet
E e ii$ercepted,? the semaining yellow 9 green
‘;tud blue,‘;\-ill compoukl a g~ccll upc?l the Paper,
r ml the11 the red and vicjlet @ng fei paf$
pill fill upon this green, and tc@e@e!-, wltk~ it
$ecompound a white. AlId thgt 111 ths tom:
pofitiou 01’ \s&te the feveral %~YS d0 TlOt fkfk
any Change iu their col&jfic qualities by a&kg
upon gnc another; but are only mjxed, :and by
.a mixture of their Qdours produce ~7!l$cp may
farther appear by thek Arguments.
- ‘If the P;I er be placec! beycmd tl;e Focus Gy
fuppofe at $ e, and then the red ,C,sl.qur at the
Lens be alternately intercepted, and let pa@ ,a7
gain, the vi&t Colour on the Paper y$l Ilgt
I%kr any Change thereby, as it ought t9 do if
ehe feveral forts of Riys a&cd uppn one an+
ther in the Focus G, wI!ere they ct$s. Neither
will ‘the red upon the Pqper be changccl
by any alterlate itopping, alld letting pals the
~viokt vi-hich. croi&h it,
And if ‘the Paper be’ placed at the Focus’G,
and the ‘>&ite roun.,d Image at G be viewed
thrqugh the Prifk HI&C, and. by the.RefracCtj&
pf that PrXm be tranflated tb tile place T VT al.r$
There appear tinged with various C~lou~s~ riame-
!y, tfie violet at .v and red at r, and others be7
ycea
.’
) and t@l the red Colqpr a~ the Lel~s
‘i - , a. .
be