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Changes in skin resistance and beat-by-beat heart rate, derived from the EKG, were obtained from the same pair of dry silver electrodes applied to the finger tips. The electronic criteria to be satisfied for application of this technique are discussed. The recording system was constructed using low-cost, solid-state circuitry. A typical record of changes in skin resistance and beat-by-beat heart rate is presented to demonstrate the performance characteristics of the equipment. [ABSTRACT FROM AUTHOR]