instantly turned out of its course, some parts more and some less,
according to the number of vibrations, and appears as the seven
colors on different parts of the screen. Fig. 6 shows the
arrangement of colors, and the number of millions of millions of
vibrations per second of each. But the different divisions we call
colors are not colors in themselves at all, but simply a different
number of vibrations. Color is all in the eye. Violet has in
different places from 716 to 765,000,000,000,000 of vibrations per
second; red has, in different places, from 396 to
470,000,000,000,000 vibrations per second. None of these in any
sense are color, but affect the eye differently, and we call these
different effects color. They are simply various velocities of
vibration. An object, like one kind of stripe in our flag, which
absorbs all kinds of vibrations except those between 396 and
470,000,000,000,000, and reflects those, appears red to us. The
field for the stars absorbs and destroys all but those vibrations
numbering about 653,000,000,000,000 of [Page 25] vibrations per
second. A color is a constant creation. Light makes momentary color
in the flag. Drake might have written, in the continuous present as
well as in the past,

"Freedom mingles with its gorgeous dyes
The milky baldrick of the skies,
And stripes its pore celestial white
With streakings of the morning light."

Every little pansy, tender as fancy, pearled with evanescent dew,
fresh as a new creation of sunbeams, has power to suppress in one
part of its petals all vibrations we call red, in another those
we call yellow, and purple, and reflect each of these in other