motion picture, effects are secured that
could not be reproduced to the slightest extent on the real stage. The
villain, overcome by a remorseful conscience, sees on the wall of the
room the very crime which he committed, with HIMSELF as the principal
actor; one of the easy effects of double exposure. The substantial and
ofttimes corpulent ghost or spirit of the real stage has been succeeded
by an intangible wraith, as transparent and unsubstantial as may be
demanded in the best book of fairy tales--more double exposure. A man
emerges from the water with a splash, ascends feet foremost ten yards or
more, makes a graceful curve and lands on a spring-board, runs down it
to the bank, and his clothes fly gently up from the ground and enclose
his person--all unthinkable in real life, but readily possible by
running the motion-picture film backward! The fairy prince commands the
princess to appear, consigns the bad brothers to instant annihilation,
turns the witch into a cat, confers life on inanimate things; and many
more startling and apparently incomprehensible effects are carried out
with actual reality, by stop-work photography. In one case, when the
command for the heroine to come forth is given, the camera is stopped,
the young woman walks to the desired spot, and the camera is again
started; the effect to the eye--not knowing of this little by-play--is
as if she had instantly appeared from space. The other effects are
perhaps obvious, and the field and opportunities are absolutely
unlimited. Other curious effects are secured by taking the pictures at a
different speed from that at which they are exhibited. If, for example,
a scene occupying thirty seconds is reproduced in ten seconds, the
movements will be three times as fast, and vice versa. Many scenes
familiar to the reader, showing automobiles tearing along the road and
rounding corners at an apparently reckless speed, are really pictures of
slow and dignified movements reproduced at a high speed.

Brief reference has been made to motion pictures of educational
subjects, and in this field there are very great opportunities for
development. The study of geography, scenes and incidents in foreign
countries, showing the lives and customs and surroundings of other
peoples, is obviously more entertaining to the child when actively
depicted on the screen than when merely described in words. The lives of
great men, the enacting of important historical events, the reprodu