An apparatus for the measurement of continuous changes in palmar skin resistance.

Abstract

The recording unit was a combination of an R.C.A. VoltOhmyst (type No. 165-A) with a General Electric photoelectric recording mi-croammeter (Cat. No. 32620; 5 microamps. full scale). These instruments were combined to form a recording d.c. vacuum-tube voltmeter with which the voltage between the electrodes attached to the subject could be graphically recorded and evaluated in terms of resistance over a range up to 80,000 ohms. The calibration and working characteristics of this apparatus are described.