X-radiograph(s) of "Mrs. Vassal"

X-Radiograph Description: X-Radiograph X-Radiograph Settings: Cronex NDT-55; 5 ma, 55 kv, 30 sec. (2) Burroughs Number: 3982b X-Radiograph(s) of: Artist: Blackburne, Joseph, American, ca.1730-after 1778 Artist: Also att. to American School Title: Mrs. Vassal Owner: Cambridge Historical Society, MA