This is a series of sequential images featuring a horse on a rocking platform and a horse on a wheel. The images document the movement dynamics of the horse in two different physical setups. The top row shows the horse on a platform with curved rockers, progressing from a still position to rocking motion as the horse's legs push against the surface. The bottom row displays the horse against a round, wheel-like object, demonstrating how it interacts with and moves around the wheel. The series appears to study the mechanics of movement in animals.