Man’s power to solve the problems of the natural world is indicated
by the feats of modern photography, of which O. H. Cloudy writes as
follows:
Just think for an instant what the twelve-hundredth part of
a second really means. A railroad train going sixty miles an
hour, or eighty-eight feet per second, would move, in such an
interval, less than one inch. A bullet, with a muzzle velocity
of twelve hundred feet per second, would get but one short
foot from the muzzle before a twelve-hundredth of a second had
elapsed. Could two bells be rung, one twelve-hundredth of a
second after the other, the sound-waves given out by them both
would travel within five feet of each other, too close for any
human ear to distinguish that there was more than one sound. Yet
in this tiny bit of time the eye of the camera can record on the
sensitive plate everything in front of it, with sufficient force
to make a good negative. (Text.)--_The American Inventor._
(1997)
=Measurement of Morals=--See CONSCIENCE A MORAL MENTOR.