The station physiologique and Georges Demenÿ (2)
Clearly seen in the photographs taken at
this time, they served as a handy guide to the
distance between two successive images and to "estimating
the size of the subject, the amplitude of his
reactions and the extent of displacement of each
part of his body"*. A chronographic dial, or
clock was made to be placed in view of the
camera. The camera too had been changed. The
shutter was now 1.30 meters in diameter with a
single slot 1/10th of its circumference. The
shutter was placed in front of the lens instead
of behind it, and the whole apparatus was
mounted inside a mobile wagon - like a small
railroad car - which ran on an iron track
perpendicular to the hangar.
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All of these improvements made the images
much sharper. So sharp, in fact, that a new and
more vexing problem soon became apparent.
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* Marey. “The
physiological station of Paris” In :
Science, 1883, vol. II, n° 42, p. 678-681 et p.
708-711. (Trad. de: La station physiologique de
Paris. In La nature, 8 septembre, p. 226-230; 29
septembre, p. 275-279). |
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