In part Ⅱ, are presented the results of the physical measurements, which include standing height, body weight, shoulder width and grip strength, made on children of middle school and children's homes. Pelidisi index is calculated by using Pirquet's formula. In tables 1 to 6 are tabulated the average results of boys and girls of ages from 12 to 18 years old. Since the results of children's homes differ from those of the middle schools, they are tabulated separately. The differences in standing height and body weight of these two groups of children are shown in figures 1 and 2. The children from the Homes are considerably shorter and lighter than school children of the some age range. The boys tend also to be narrower in shoulder width.Compared with the physical measurements of the children of Shenyang in the northeast China, the Cantonese children are slightly taller and heavier at the beginning of this age range but the children of the Northeast grow at a slightly more rapid rate, so that at 18 years of age, they are about 2 cm taller, with approximately the same body weight.Hand grip measurements show that girls have only 2/3 the grip strength of boys. Values of Pelidisi are calculated for a]l the children. It is found that this index does not proper]y represent the nutritional status of the children of Canton. By all the other indices of the state of nutrition used in this survey, the school children are rated as having a higher nutritional status, than those of the children's home, while the Pelidisi ratcs them lower.Nutrition is considered to be one of the factors which causes differences in the growth and development of the various groups of children compared.

This study is undertaken simultaneously with the experiments for the determination of riboflavin requirement of middle school boys in Canton. The same subjects serve in both experiments. When the loading tests are performed, 2.0 mg of thiamine is given orally at the same time the riboflavin is administered. Supplements of 0.5, 1.0 and 1.5 mg thiamine are given at the same time and in the same order as the ribofiavin. The same urine samples are analyzed for thiamine as well as riboflavin. Thiamine is analyzed by the thiochrome method of Consolazio.The thiamine content in the one-hour urine samples of the subjects before the supplement averages 5.4 to 8.9 micrograms for the 4 groups. After supplementation, the thiamine content of the fasting samples of 1.0 and 1.5 mg supplement groups show definite increase, while the other two groups remain near the same levels.After the loading test, the 4-hour total excretion amounts to about 5 per cent of the 2 mg taken, with almost no difference among the groups. When the intake of thiamine has been supplemented for two weeks, the response to the loading test varies. The 0.5 mg supplemented group excreted 4.35% of 2 mg in 4 hours, while the 1.0 and the 1.5 mg groups excreted about 8%. The hourly excretions are shown in Fig. 1. The peak of excretion of the 1.5 mg supplemented group changes from the second to the first hour after the load test. The thiamine intake of these subjects is estimated to be about 1 mg daily. They are free from symptoms associated with thiamine deficiency and their 1-hour urine samples show that the quantity excreted may be within the range considered normal for healthy subjects, yet supplementation of 1.0 or 1.5 mg of thiamine is able to cause a greater and faster urinary excretion of thiamine. An additional intake of at least 1.0-1.5 mg thiamine to their ordinary dietary intake of about 1 mg may be desirable to ensure an optimum status of thiamine nutrition in the middle school boys.