praxinoscope was an animation device, the successor to the zoetrope. It was invented in France in 1877 by Charles-Émile Reynaud.
Like the zoetrope, it used a strip of pictures placed around the inner
surface of a spinning cylinder. The praxinoscope improved on the
zoetrope by replacing its narrow viewing slits with an inner circle of
mirrors, placed so that the reflections of the pictures appeared more or
less stationary in position as the wheel turned. Someone looking in the
mirrors would therefore see a rapid succession of images producing the
illusion of motion, with a brighter and less distorted picture than the
zoetrope offered.
Source: wikipedia
http://en.wikipedia.org/wiki/Praxinoscope
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