This is a vintage, black and white photograph depicting a person in the midst of swinging their arms. The image is titled 'FIG. 11—DOWNWARD AND UPWARD ARM SWINGING.' The person is captured in profile, standing upright. They are wearing what appears to be shorts and a short-sleeved shirt, and shoes. The most striking feature of the image is the motion blur created by the swinging arms. The arms are not clearly defined but appear as a blurred, circular arc around the person's body, suggesting rapid movement. The blur is more pronounced at the ends of the arc, indicating the speed of the swing. The person's body is relatively sharp, but there's a slight blurring effect due to the movement. The background is completely black, which emphasizes the motion and the figure. The image has a scientific or documentary feel, likely from a study of human movement or biomechanics.