The effects of environmental temperature on the basal heat production had been examined in every season of the year and described in report I to IV (Japanese J. Nutr. 13, 135; 14, 43, 49, 1956; 15, 83, 1957). In this paper the results of these previous reports are summarized.
1) The increases of the heat production at the environmental temperatures from 40°C to -20°C in seasonal measurements were as shown in table I, and these rising metabolic values were estimated as in table 4, excluding the influence of the restless. These data show that the heat production within the first hour at 10°C and 0°C temperatures do not increase significantly when the subject is kept at warm condition with clothing. Even at lower temperature -10°C, the rise of metabolism at the first hour is only two per cent in case of warmly clothed condition. This fact was demonstrated theoritically in the previous experiment by the method that the subject's head was exposured in the cold room (0°C and -16°C) and his body was placed in the comfortable room (30°C).
This result will wake a practical contribution to the question in case of measuring the basal metabolism in snch place where airconditioning is not adequate in winter.
2) The basal heat productions at the artificially different temperatures showed differences in seasonal measurements: the increase of the heat production in cold environment remained at lower level in winter and spring as compared with other seasons, and in winter, moreover, the metabolism in hot environment did not increase so much as in other seasons. This seasonal inclination suggests that in winter the physiological status of human is much tolerable or adaptable against a wide range of environmental temperatures.
In addition, the variation of the respiratory quotient, pulse rate, respiration rate, blood pressure and skin temperature were observed.

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To investigate the absorption of carotene, this experiment carried out on a large dosage of carotene to adult rat for a few days, the carotene excretion in feces was estimated as well as the vitamin A storage in livers, and plasma levels of vitamin A and carotene. The experimental method followed report (III). The results are summerized as follow;
The absorption of carotene, from the point of the vitamin A storage in liver, was recognized less efficient than that of vitamin A in the rats fed large dosage of carotene. Moreover, in spite of large dosage of carotene, there was no appreciable increase in plasma vitamin A and carotene. There was also recognized the comparatively small amount of carotene in feces.
It is considered, therefore, that the absorption of carotene in vivo, even when rats were fed large dosage of carotene, shows the less efficiency than vitamin A within a certain limit.

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A survey was carried out in order to investigate what kind of the cooking method was most widely used on vegetables which has been considered to lose much amount of nutrients by cooking.
All the vegetables ingested in Feb., May, Aug. and Nov. by the families in Tokyo selected for the National Nutrition Survey were divided into twelve groups according to the methods of cooking, and the percentage of each groups was calculated.
As the result indicated, potatoes and colored vegetables were used the most in soup and boiling, and the other vegetables were predominant in pickling, soup and boiling comming the next.

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For the purpose of decision of nutritional requirement for prisoners, absorption rate of food, basal metabolism, body density and blood gravity were measured during 36 days.
From the results obtained such as the higher absorption rate of food, decrease of body weight and basal metabolic rate, and negative nitrogen balance, all of which were caused by 2100 calories supply, it is considered that the present scheme supplying 2100 cal. is not enough for prisoners engaging in no work.

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From the standpoint of the previous report in which the present supply of 2100 cal. was proved to be insufficient for prisoners engaging in no work, effects of supplies containing more calories, namely 2300, 2500 and 2900 cal. were observed in this report.
Supply of 2300 cal. maintained the nitrogen balance, body weight and basal metabolic rate, all of which were decreased in 2100 cal..
Therefore, present scheme furnishing 2100 cal. for prisoners engaging in no work should be improved to be increased by 200 cal. more.

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Pressed barley was enriched by vitamin B₁ derivatives by the simplified method of the authors.
Water insoluble thiamine derivatives, such as thiamine dicetyl sulfite, dibenzoyl thiamine and thiamine nitrate were heated and sprayed over the barley cereals, and then cereals were pressed.
These thiamine derivatives absorbed by the pressed barley cereals were resisting to the washing with water.

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The purpose of this experiment was to investigate the relationship between aureomycin and sulfamin. The diet was made by adding 2g of sulfaphthalidine to the basal diet of 100g. Young albino rats were fed on these diet for 4-8 weeks.
The administration of phthalidine and aureomycin, influenced worse upon growth-rate and deposition of body fat even Vitamin B₁₂.

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