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AMATEUR CHRONOPHOTOGRAPHIC APPARATUS.


At the time that we described the Demeny chronophotographic apparatus
we remarked that it had the advantage of permitting of the projection
of very luminous images of large dimensions; but it is certain that
the cases are somewhat limited in which there is any need of using a
screen 24 or 25 feet square, and, as a general thing, one 6 or 10 feet
square suffices. The manufacturer of the apparatus, M. Gaumont, has,
therefore, been led to construct a small size in which the bands have
the dimensions usually employed in the French and other apparatus,
thus permitting of the use of such as are now found in abundance in
the market.

By reducing the size, it has been possible further to simplify the
construction, and at the same time to reduce the price, thus making of
the new form a genuine amateur apparatus.

It will be remembered that the Demeny principle consists especially in
the avoiding of traction upon the perforated part of the band, which
is the portion that always presents the most fragility. This principle
has naturally been preserved in the small model, and a preservation of
the bands for a long time is thus assured.

[Illustration: FIG. 1--ARRANGEMENT OF THE SENSITIZED BAND IN TWO