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Box containing paper trays

1989
7550A plotter as used in the Biosignal Laboratory at the Institute of Psychiatry, London, England, established by Professor Hans Eysenck and Dr Paul Barrett to conduct investigations into the relationship between psychophysical and psychometric measures, 1988-1994.

7550A plotter as used in the Biosignal Laboratory at the Institute of Psychiatry

1989
7550A plotter (with paper trays, pens and pen units), as used in the Biosignal Laboratory at the Institute of Psychiatry, London, England, established by Professor Hans Eysenck and Dr Paul Barrett to conduct investigations into the relationship between psychophysical and psychometric measures, 1988-1994.

7550A plotter

1989