Unlike the motion studies of Eadweard Muybridge, who depicted movement as a series of discrete moments on separate, sequential negatives,
Marey’s analyses of motion are characterized by multiple exposures on a
single photographic plate. In this photograph, Charles Fremont, a civil
engineer who assisted Marey in his laboratory, used Marey’s method to
study blacksmiths at the anvil; the dynamic synthesis of their arced
blows traced the pattern of manual effort involved in the task.
Fremont’s photographic investigations into the conservation and
expenditure of energy during human labor established principles that
laid the foundation for modern industrial production.
The things you learn making animated gifs! Here is a set of damselflies in flight, with various speeds, in a report on an international exposition of air flight in the National Air and Space Museum’s rare book collection. While my French is not the greatest, it looks as if various institutions including le Muséum national d'histoire naturelle, la Station physiologique du Collège de France, and l'Institut Marey worked together to study flight of insects and other animals for the International Exposition on Flight, the first airshow held at the Grand Palais in Paris, 1909.
L'Institut Marey was named for Etienne-Jules Marey, a physiologist and contemporary of Eadweard Muybridge. Marey had developed a camera expressly for the scientific study of movement. His last assistant and later replacement as head of l'Insititut Marey, Lucien Bull, further developed the technique by devising a high-speed camera to capture never before seen phenomenon such as a bullet piercing a soap bubble. It was a camera like this that Bull probably used to take the photos of this damselfly. For the first time, they could see precisely how insects took flight. Marey and Bull’s “gun camera” would later develop into modern cinematography, birthing a whole new industry you are probably familiar with.