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W. F. G. Swann connecting wires on scientific equipment, unidentifed man looking on.
W. F. G. Swann bending over box, examining equipment.
Two unidentified men, standing beside scientific equipment.
W. F. G. Swann and unidentified man constructing equipment.
W. F. G. Swann, examining equipment, full length view.
W. F. G. Swann and unidentified man, examining equipment.
W. F. G. Swann, full length view, examining equipment.