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W. F. G. Swann, examining equipment, full length view.
W. F. G. Swann with Dr. Szanto and Dimitri Mitropoulos at Philadelphia Musical Academy 76th Commencement.
Exhibit at Sesquicentennial Exposition, Philadelphia, Pa., 1926.
W. F. G. Swann, full length view, examining equipment.
W. F. G. Swann, at awards ceremony, Dr. Adams receiving Franklin Medal.
Two unidentified men, standing beside scientific equipment.
W. F. G. Swann and others, group portrait at Medal Metting of Franklin Institute.
W. F. G. Swann bending over box, examining equipment.
W. F. G. Swann and unidentified man, examining equipment.
W. F. G. Swann, foot on chair, working on equipment with unidentified man.
W. F. G. Swann connecting wires on scientific equipment, unidentifed man looking on.
W. F. G. Swann and unidentified man examining equipment.
W. F. G. Swann and unidentified man working with scientific equipment.
W. F. G. Swann, seated at table, unidentified man at microphone.
W. F. G. Swann and others in tuxedos, group portrait at Franklin Institute.
W. F. G. Swann and Niels Bohr, at Franklin Institute.
Two unidentified men examining equipment.
W. F. G. Swann and unidentified man constructing equipment.