X-radiograph(s) of "Three Girls in a Park"

X-Radiograph Description: X-Radiograph X-Radiograph Settings: Kodak M-1 ?; 5 ma, 50 kv, 75 sec., 40" from tube; Burroughs Number: 4721 X-Radiograph(s) of: Artist: Yewell, George, American, 1830-1923 Title: Three Girls in a Park Date: 1861 Description: Unlined, unstretched no tacking margins Owner: Harvard University Art Museums Object Number: 1895.661