Opticks 1717 - Up

&rays rhe fame lk.zd entirely as at fir& T’he
1il;e conitancy and immutability I found alfo in
the blue, green, and. other colours. so alfo if
1 looked through a Prifill upon any Body illuminated
with.any part of this homogeneal Light,
as in the fourteenth Experiment of’the ,firfiBoolr
is defcribed ; I could not pcrccive any 1~~7 CO-:
lour generated this -way. All Bodies illumiua--
ted GTith compound Light appear through Prifms
confttfed (as was kid above) and tinged with
various new Colours, but thoi‘e illuminated with
homageneal Light appeared through .Prifms
neither lefs dill&A, nor otherwife colou?d.,
than when viewed with the nakedEyes. ,Their
Colours were not in the lealt changed by the
Refraktion of the interpofed Prilin. I ipeak
here of a fem3..~le chauge of Colour : For rhe
Light which I here call homogeneal, being not
abfolutely homogeneal ,. there ought to arife .
fame little change of Colour from its heterogeneity.
But if that heterogeneity was fo little
as it might be made by the faid Experiments
of the fourth Propofition, that change was not
knfible, .and therefore in Experiments, where
Senk is Judge, ought to .bc accounted none
at all.
,,
E.vper. 6. And as thefe Colours were not
changeable by RefraCtions, fo neither were they
by: Reflexions. For, all white, grey, red, ye&
low,.green, blue, violet Bodies, as.Paper, ‘A&s,
red Lead, Orpiment,.; Indico, ,13ife, Gold,- Silver
, Copper, Grafs,’ blue Flowers,; Violets,
Bubbles of Water tinged Gith various Colour$
Peacock?s F,edhers3 the Tin&we of L@ws
Jvqhri-