Wood County reporter. [volume] (Grand Rapids [i.e. Wisconsin Rapids], Wis.) 1857-1923, 1874-06-11
Ire to pay attention to what l might tell

Oh, yes" cried Johnny; "you made
rainbows on the wall with it one day."
| lou remember, too, that | showed
you how sunshine, or white light has all
the colors in it, and the prism scatters
them, don't your"
Yes" said Johnny, though not so
confidently as before.
| "1f the sun were shining l could show
you the same thing now; and by study
ing the colors with the glasses | think
we might discover something worth
knowing about them. Maybe we can
| with picture of the colors in book I
have"
| | got the book and turned to where the
colors were printed in order on black
| grOund-red, orange, yellow, green, blue
and violet very pretty to look at, though
not nearly so bright as when seen through
the prism.
TRY them" said, with the three
| glasses together"
Johnny did so, and said he could see
nothing through them; they looked per-
fectly black.
When you look toward the light?"
Yes" said Johnny; not bit of light
comes through them"
What can you see with the blue
alone?"
Only the blue" said Johnny, looking
again at the colOred page.
so the blue glass cuts off all the
colors except blue?" l said.
| Now try the red glass and tell me
what colors are cut off by it."
| The blue and the green," Johnny
replled: Il can see the red, the orange,
ana little OF the yellow; the red best"
Ii the glass were pure red you would
| n thnC
| They would be cut off with the green and
the blue"
"This green glass is not pure color.
either" continued, trying it. "The
only ColOrs it cuts off perfectly are the
red and the orange. That accounts for
| the appearance Of the fire through it.n
"Does it?" asked Johnny "Howe"
"Look at the fire through the prism
and tell me what colors you see."
a see red and little yellow" said
Johnny, looking as had told him to.
"That shows the fire is giving off only
red and yellow light. If the Goals were
white hot, you would see green, and blue,
and violet besides. AS it is, the fire gives
only the three colors you have seen; and
since the green glass cuts off the red and
the orange you can see in the fire through
the green glass nothing but yellow. Try
it."
al tried that before" said Johnny,
looking once more at the Goals through
the green glass. "The yellow is deep
down between the Goals; on top they are
black''
"Where is the green"
"What greene"
"Why, the green which the green glass
covers things with, as you told me-"
There isn't any," said Johnny,
promptly. Then he added, moment
after:
az didn't know any better when said
that"
"Now let US go step further. When
we look at the page Of colors we see that
the red glass cuts off all the colors except
red, orange, and little of the yellow"
Here [ put card over the green, the blue
and the violet. "The green glass cuts off
the red ana the orange" and | put an
other card over those two cOlOrs. eff we
should put the two glasses together and
look at the page what do you think we
should see? 2"
yellow, wouldn't we?'' said Johnny,
seeing that to be the only cclor uncovered.
"Try, them" said.
Johnny put the red and green glasses
together, looked at the page very care
fully, then said:
Yes; see only yellow-and not much
of that
"That is because most of the yellow is
cut off with the other colors," | said,
"partly by the red, partly by the green
glass. The light that comes from the
sky just now is white, like the thin
clouds that cover the sun; and white
light, you know, has all the colors in it."
eyes, know that" said Johnny.
"The blue glass, as we have seen, cuts
off all the colors except its own" l said;
so when you look at the sky with it
the clouds seem to be-?"
"Blue," said Johnny, trying the glass.
"The red glass-mOre properly yellow
ish red glass-cuts off all the cOlOrs ex-
cept red and orange and little of the
yellow; so the sky seems a sort of golden
red through it. Doesn'tit?"
Yes" said Johnny, trying the red
glass.
"The green glass cuts off the red and
orange and part Of the blue, and lets
green; so the sky through it looks-?"
"Green," said Johnny; "a pale sort of
green"
Il don't know any name for that pecul-
lar tint of green" said, taking the glass
from Johnny and looking at the sky
through it. I" 1t is something like apple
green. Now if you were to put the (yel-
Iowish) red and the (yellowish) green
glasses together, as we did a while ago., L
think the sky would look quite yellow
through them, since both lei yellow light
pass, and together they cut off all the rest
of the cOlors."
$50 it does" said Johnny, when he
had done as | said; "a smoky kind of
yellow, almost buff"
"You begin to see now, think, how it
is that colored glasses change the looks
of things"
GA little" Johnny said" all but black
things. Why don't they change them?"
"Thiugs are black for lack of COLOR
replied. Gin other words, they give off
comparatively no light. All the colored
glasses can do is to stop any faint light
that may come from such objects, and
that of course only makes them seem
blacker. See, my ink bottle looks black
because the ink stops all the light except
little that is reflected from the curve of
the glass, especially on the two sides to-
ward the windows where there are bright
spots. If you look at it through the col
ored glasses most of the reflected light
will be stopped and the ink-bottle will
look blacker; and the bright spots which
give white light will have the color of the
glass you look through"
so they do" said Johnny, trying the
glasses one by one.
CHOW, look at these" | said, taking
from my desk two small bottles, one with
Il II