French #physiologist and #chronophotographer who, while studying how blood moves in the body, inv…
Published
French #physiologist and #chronophotographer who, while studying how blood moves in the body, invented the #sphygmograph. This device made a graphical record of the pulse and variations in blood pressure. One end of a lever rested on the #veins in the wrist, while a #stylus on the other end inscribed the #fluctuations of the heart onto a carbon-blacked strip of paper moving at a uniform speed. He took an interest in the flight of insects and birds. In 1869, Marey demonstrated how an insect flies by moving its wings in a figure-8 shape. Inspired by Muybridge's work, Marey studied the movement of animals by photographing multiple images on a single plate. He also used a high-speed motion camera to produce film to view in slow motion.
