This experiment was carried out in October 1953 as a series of previous experiment (Jap. J. Nut. 13, 135, 1956). The experimental methods and conditions were the same in previous experiment. The results obtained were as follows.
1) The variation of the heat production due to the influence of the restlessness, which could not be avoid thoroughly while the subject is kept at basal metabolic condition during a tolerable long time, showed the rise of about 3 per cent at comfortable temperature 20°C in this experiment.
At 30°C temperature, slight rising metabolism was seen at second hour, but the average heat production in two hours had no signifcant variation.
At 40°C temperature, there was the rising metabolism of 7 to 8 per cent in consideration of the restlessness.
In lightly clothed conditions at lower temperature below 10°C, the rising metabolism accompanied with involuntary chill and shivering showed the increase of 13 per cent above basal in two hours at 10°C, 44 per cent at 0°C and 85 per cent at -15°C. In this cold conditions, the tensely superficial respiration by the shivering and compensatively deep respiration were seen alternatively as shown in figure 5 to 8.
In warmly clothed conditions at lower temperature below 10°C, the signifcant variation was not recognized in the basal heat production at 10°C, 5°C and 0°C, but at -15°C the increase of 30 per cent was seen in average for two hours (see table 1 and figure 1 to 4).
2) The variation of the skin temperature were the largest at the peripheral place such as the hand. foot and forehead, and at the stem such as breast and abdomen were little, even in lightly clothed conditions at 0°C and -15°C, as shown in table 2 and figure 9 to 11.
In the warmly clothed condition, for 0°C and -15°C, slight fall of the skin temperatures were seen at the hand and foot.
