Macintyre's X-Ray Film is an 1896 documentary radiography film directed by Scottish medical doctor John Macintyre. The film shows X-ray images of a frog's knee joint and an X-ray radiograph of an adult's heart and digestive tract (using bismuth as contrast). Each image was captured in 1/300th of a second. Text from the film's title card reads: "First XRay Cinematograph ever taken, shown by Dr. Macintyre at the London Royal Society, 1897." The title card between the footage of images of the heart and stomach reads: