It is not surprising that these pictures of Muybridge interested the French painters when he came to Paris, but fascinated still more the great student of animal movements, the physiologist Marey.

He had contributed to science many an intricate apparatus for the registration of movement processes.

"Marey's tambour" is still the most useful instrument in every physiological and psychological laboratory, whenever slight delicate movements are to be recorded.

The movement of a bird's wings interested him especially, and at his suggestion Muybridge turned to the study of the flight of birds.

Flying pigeons were photographed in different positions, each picture taken in a five-hundredth part of a second.
But Marey himself improved the method.