On June 15, 1878, a clear and sunny day in Palo Alto, California, amid a gathering of art and sports journalists, Eadweard Muybridge photographed the first successful serial images of fast motion. The subject of these photographs was the trotting horse, Abe Edgington, harnessed to a sulky. The horse was owned by railroad builder and former governor, Leland Stanford. The images proved Stanford's theory that during a horse's running stride, there is a moment of suspension where no hooves are touching the ground. In the clip below Abe Edington trots at a 2:24 gait, which is a velocity of 25 mph (40.2 km/h) or 36.7 feet per second.