“…Besides this, a shifting to the right can be observed of the sleep-waking distribution, as can be seen in the development of a diurnal rhythm of heart rate and of the body temperature. It can be recognized by the incidence We have tried to clarify the development of a daily rhythm of electrical skin resistance [16,17,18]. We used a measuring procedure which was proposed by Rutenfranz [19], by which the electrical skin resistance was measured against a direct current of two volt intensity.…”