This study of 1230 infants and newborns was undertaken to realize the development of motor activity. Followings are the results obtained. (1) The percentage of the infants who had acquired the activity arised with the monthage advanced, increasing its value rapidly near the point at which median infants had acquired the activity. And it became a slow increase after that point, showing this tendency more obviously in the higher stages of motor development. (2) The harder became the behavior to achieve, the longer were needed the periods during which the percentage of the infants who had acquired the activity came to 100% from 50%, for there were the infants who acquired the activity extremely late for their chronological age. This fact suggests that the motor development is affected by the physical and environmental components. (3) No remarkable differences were observed in the period at which 50% of the infants had acquired the activity comparing with the pre-war babies. (4) No sexual differences were observed in the period at which 50% of the infants had acquired the activity
To clarify the relation between the physical growth and the motor development, 1230 infants between the ages of 1 and 20 months were taken measurements of their height and weight, and tested for the development of their activity. Followings are the results obtained. (1) The percentage of infants who had acquired the activity arised higher with the growth of weight and height, showing a rapid increase in percentage near such a value of physical growth at which 50% of the infants had acquired the activity (2) The higher became the stage of motor development, the larger was the difference in the values of physical growth during which the percentage of the infants who had acquired the activity came to 100% from 50% than that in the values during which the percentage came to 50% from 0%. (3) The higher became the stage of motor development, the larger became the number of the infants who failed to acquire the activity in spite of their physical growth being in higher level, suggesting more complicated mechanism of the acquisition of activity
There are seen many reports on the motor development in infancy, but few on it with the growth of height and weight and none with pelvic growth. This study of 1230 infants and newborns, before the age of '20 months, sampled at random by sex, month-age and season of birth, from the district under the control of one health center in Aichi Prefecture, was undertaken to analyze the relation between the growth and the development of them. Followings are the results obtained. (1) Standing height, body weight and the distance between both femurs were found to be greater in the group whe could climb up with the significance of 1% level than in those who could not, through the both sexes during the acquiring periods, in spite of their same chronological age. (2) Body weight and pelvic breadth were found to bo greater with the significance of 5% level in the group of walking with both hands held than in those who could not during the same period. (3) Not only the growth of height and weight but also that of the horizontal distance of hip-joints were respectively more eminent in the both groups who could climb up and walk with both hands held.
The marriage circle for parents of pupils of junior high school in Fukushima City was surveyed. The results were obtained as follows. 1) The farmer was the narrowert marriage circle among all occupations. 2) The forwander was the second narrower circle in all occupations, the person without a regular occupation was the third. 3) The merchant was the fourth narrower circle, but larger from sextuple to octuple than the marriage circle of the farmer. 4) The marriage rate of the bussiness man and public service personal in case of the same country was slightly larger than in case of the different country or the different prefecture. 5) The marriage circle of the manufacturer, teacher and constructor was very larger than other occupations. 6) The marriage rate of the outdoors worker in case of the same country was larger than in case of the different country or the different prefecture.
The findings of studies on the distribution, which was insected for 7 months by the author, of the eggs of ascaris lunbricoides in the soil of the rural vegetable gardens, the residential districts and the play grounds in Aizu-Wakamatsu, and that about season rise and fall, which was inspected for a year, of the eggs of ascaris lumbricoides in the soil of the rural vegetable gardens are following 1. By the inspection of the eggs and I.F.D, comparing about the distribution of the eggs in the soil, the rural vegetable garden showed the highest, and next the play ground of the branch schools in the remote place showed about 1/2 distribution of the rural vegetable gardens and it was comparatively higher. The next was the kitchen garden of the house lot, compared with them, the flower-bed of the house-lot was by far lower and both the playground of streets and the farm-village were the lowest. But the average numbers of eggs in one specimen was the highest at the kitchen gardens of house lot. Cause this was found as a specimen which showed especially many numbers of the eggs detected in the picked specimen in the kitchen gardens of hous lot. And this should be attentioned. 2. In the kitchen gardens of house lot and the rural vegetable gardens, the distribution of the eggs of ascaris in the soil which was manured was higher than in the, soil which was higher than in the soil which was not manured. 3. At the past of the ditch and of the ridge in the rural vegetable gardens, compared I.F.D. with I. V. D., in general, the past of the ditch was little higher than of the ridge (expect June) in I. F. D. and the ridge was little higher than the past of ditch in I.V.D. (expect June and Jan). 4. At the rural vegetable gardens, devided to the kinds of works, season rise and fall of the average numbers of eggs in logr, and the numbers of eggs containing decreased at all gardens in midsummer. 5. From I. V. D. and I. F. D. of the ridge and of ditch at the rural vegetadle gardens, I. I. P. was found. Judging from this study, the chance of the infection by the eggs in the soil of the rural vegetable gardens was much in spring, July and Autumn, especially spring was important and in midsummer it was a little.
The findings which were odserved how comparative length of the sunshining-hour influenced to the eggs of ascaris lumbricoides in the soil, considering a temperature, rain-fall and depth, and were observed the cultivation in the incubator to examine how temperature and dry influenced to the eggs in the soil, are following. 1. When it was droughty in summer, the eggs in the soil began to grow up just same speed without the relation of the length sunshining hour. And then most of them except the ones in shade died out within 1 month. Compared the speed to die out, the difference of long and short of the sunshining hour was hardly related. The longer the sunshining hour was, the more quickly they did not always die out, but the eggs in the quite shade died slowly. 2. When it was more cloudy or raing from midsummer to early autumn, the eggs in the soil grew very much comparatively, the longer the sunshining hour was, the more quickly they grew. But big difference was not showed. 3. Following the observation about long or short of the sunshining hour when the depth ofthe soil was divided to the upper layer (0-0.5cm) and the underlayer (0.5 3cm), on the speed to die or to grow, the eggs in the upper layer died or grew a little than the eggs in the underlayer. 4. Without the relation of the sunshining, following the findings the eggs in the soil were grown in the incubator, the days by all of them formed are under 30°C, 17 days this was the shortest out of 20°C, 25°C, 30°C -in the damp soil. 30°C was - the most suitable to grow up. 35°C, 40°C troubled to grow and let them die out. Compared them, in the dry soil the days by all of them died out are under 40°C within 3 days, 35°C within 5 days, 30°C within 6 days, 25°C within 10 days, 20°C within 13 days.