In connection with psychogalvanic studies of emotional reactions reported elsewhere by one of us (H. C. S.),1measurements were made of the electrical resistance offered by the body to an imperceptible, constant, galvanic current. This paper deals with these data on resistance compiled from 161 records taken on 126 persons, of whom 87 were normal and 39 were of psychopathologic reaction types. The skin resistance was measured before and after each psychogalvanic record. During the test a standard list of about 100 words was read aloud to the subject, and several other auditory stimuli (handclap, automobile horn) and tactile stimuli (pin pricks) were presented. The whole experiment lasted from thirty to fifty minutes. Richter,2studying the skin resistance under various conditions (during normal sleep, after injection of drugs, etc.) in both normal and pathologic subjects, has been interested especially in the physiologic factors that determine this phenomenon. It