This film is called the negative. From it any number of
positives can be made, all depending on the popularity of the
subject.
To make positives, the negative film is laid on another strip of
sensitive celluloid of the same size. The two films are placed in a
suitable machine, and then set in front of a bright light. The two
films are then moved along so as to print each of the thousands of
pictures previously taken.
The positive film is then developed, "fixed" to prevent it from
fading, and it is then ready for the projecting machine. This latter
is like the old-fashioned stereopticon, and by means of suitable
lenses, and a brilliant light, the small pictures, hardly more than
an inch square, are so magnified that they appear life-size on the
screen.
That, in brief, is how moving pictures are made and shown, but it
tells nothing of the hard work involved, on the part of operators,
and actors and actresses. Often the performers risk their lives to
make a "snappy" film, and many accidents have occurred where daring
men and women took parts with wild beasts in the cast, or dared
serious injury by long jumps.
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