In this study the author made an effort to discover the characteristics of the relation between the actual velocity of wind V and the speed of rotation of the anemometer-cups u, from the experimental datis with respect to the Kew standard nine-inch-cup-anemometer. As the result of this investigation, we obtained three sets of empirical formulas of different degrees of accuracy, which show us fair general feature of the relation between V and u. Even by the most simple formula of them, the deviation of the culculated value of V from the observed one does not exceed 1.5 percent of the latter. From a theoretical point of view we can induce a general relation This formula coinsides with our empirical ones at many significant points.
In this short report, are given the preliminary study of the results of observations of solar radiation made by means of silver-disk pyrheliometers at fifteen meteorological stations in Japan. Observations has been carried out three times on every clear day since August 1932, and only those results that are obtained from the observations when the sun's disk was free from clouds were used for present discussion. Computing the hourly and monthly mean values of the transmission coefficients, their distributions are investigated and, diurnal as well as seasonal variations compared with one another.
In this paper, the air temperature and the earth temperatures of various depth in a “Frame”, which constructed for horticultural use in the site of the Central Meteorological Observatory in Tokyo, were investigated. The glass lids of the frame were closed as usual throughout the seasons and the records were taken by a thermograph and the various underground thermometers at the depth of 0-0.5, 0.1, 0.2 and 0.3 metre respectively. The temperature in the frame was compared with that in the field, and some characteristics of the frame were discussed.