The deficiencies of animal proteins, calcium and vitamin B2 were pointed out in the National Nutrition Survey in Japan recently. We supposed these were one of the reasons why the physical growth of Japanese was not so good. Our pr sent investigation was undertaken for the purpose of helping to clarify the problem of the effect of calcium or the physical growth of children. To supply enogh of calcium which is short in food, 1.0g of oyster shell powder was given to 38 children per head per day at the Kamakura Seashore School and their physical growth and calcium and phosphorus contents in their serum were measured and compared with those of the control children. According to the results, it is observed that calcium contents in serum of xperiment children were more increased and the development of finger bones mesured by X-ray phato was apparently more improved than those of the control children.
Vitamin C contents of grated radish are differrent by the parts of radish as well as the radish varieties, most in the leaves and getting less downwards in the root. The mixture of grated carrot with radish distructs its vitamin C, proportional to the content of carrot. This is supposed to be the action of the ascorbic acid oxydase contained in the carrot, and the addition of a little vinegar fairly protects the destruction of vitamin C.
The nutrient intake of fisher-men and fisher-women was investigated in Hokkaido on may 1951. The average daily intake, of each of the eight nutrients, based on 3 days records, in given in Table II. Its rusults demonstrated that the average amount of their nutrient intake was adequated except V. A, V. B2, V. C, when judged by the recommended allowance. According to the time study, both fisher-men and fisher-woven lavoured for 11-12 hours a day at fishing ground or farm. And they had little time for their culture and amusement at home.