In this paper the author applied the well known functional form for fluid resistance, that is on the determinationof a new formula for the ascending velocity of the pilot balloon in the open field. As an observational material for the determination of the numerical values of the constants in the formula we took the results of observation of the balloon ascent in open air at the Aerological Observatory at Tateno. Thus we obtained as the new formula, in which the velocity of balloon ascent U is expressed in metres per minute, the lift L and the buoyancy Q are in grams. The calculated values of U by the new formula show better coincidence with the observed ones than those by the formula of Tateno, of the Signal Corps of U.S.A., and of Dines. The numerical value of n obtained is 0.3293. This means that the ascending velocity of the pilot balloon varies as ρ-0.0681, where ρ is the density of the surrounding air. The smallness of the index of ρ is the second strong point of the new formula.
On the middle of October 1932 the limnological observations were made at eight ponds situated in the Etigo district and water temperature, oxygen content, hydrogen ion concentration, free carbon dioxide, chlorine, soluble organic matter, silicate, phosphate nitrate and nitrite were determined. At Asahi-ike the temperature. O2-, CO2-content and pH were observed at 14 stations and the figure of their horizontal distribution show that the values of O2 and pH are higher in the littoral region than that in the middle part of the pond, due to the photosynthetic reaction of the bottom flora. Phytoplankton especially Synedra pulchella is extraodinarily predominated in the water of Utibori, counting 98, 000 per 10 c. c. The relation between the quantity of plankton and the amount of the nutrient salts as above mentioned was examined. As far as the present observation is concerned, the limiting factor controlling the production of the ponds seems to be nitrite or phosphate.
In the previous report, time-distance curves of P-wave are obtained by some large earthquakes of both shallow and deep origins occured in our country. Then the “Japanese mean time-distance curve of P” is determined and discussed comparing with other some curves which were already obtained by foreign authors. In the present report, the time-distance curve of S-wave is obtained by the large deepfocus earthquake of Mar. 29, 1928, and its “reduced time-distance curve” is also made. It is generally known that a distinct phase of S is sometimes very difficult to find in the seismograms observed in the case of shallow earthquake. In the present investigation, it is found to be still difficult to get an accurate time-distance curve even by the earthquake (1930, V. 24) having the focal depth of 85 km. From two time-distance curves of P and S, the propagating velocities of seismic waves in the earth crust are calculated by well-known Herglotz and Wiechert's method. The result thus obtained may be seen in the tables as well as the illustrations shown in the following part written in Japanese. These values obtained by us are nearly similar to those of E. Wiechert, B. Galitzin, C. G. Knott and others, especially to those of H. Witte which were deduced from the time-distance curves recently obtained by H. Jeffreys. Indeed, this investigation is nothing but a usual calculation sometimes tried by seismologists, but our present result is considered to be worthy of notice on the point of accuracy.
The results of observations and brief discussion of the large meteor appeared at 4h 23m C. S. T. of Japan on Nov. 18, 1931, above the northern part of Japan. The meteor is found to belong the Leonids, the height of appearance and disappearance and the length of path are respectively 238km., 68km, and 209km. The train left by the meteor was seen with naked-eye for 15 minutes (about 80km. above the earth's surface), and the lower part of it seems to be shifted towards N30°W. The velocity of diffusion of the train vertical to the path was about 3.3 metres per second.
This method is simply done by making a long thin narrow rising closely and parallel to the joint of cilinder, and a special small rod parallel to the penholder. Thus, when the pen just comes on the joint of recording paper, the small rod reaches on the rising; this put the pen so separate from the seam of recording paper that the pen does not be caught in it.
With some modifications of Max Margules' method, the present author intends to discuss the diurnal change of atmospheric pressure as surface waves induced by the local distribution of air temperature and proposed a new method to determine the “eddy diffusivity” using the observations of atmospheric pressure. For an example, according to the observations at Mt. Tukubasan, the eddy diffusivity is evaluted as 1.4×105 C. G. S.