In the present paper the author proposes a simple method for the determination of the amount of ozone in the upper atmosphere. It is nothing other than Götz's classical method and consists in observing galvanometer deflections caused by the photo-current of a cadmium cell when exposed to the solar radiation with and without filter. The ratio R, of the two successive exposures gives the amount of ozone s, with an aid of a system of s-contours in(R-secz) plane. The effects of ambiguity in the characteristic factors of various parts of the instrument are discussed. He proposes a tentative means of finding a correction factor for it. A program for this work is specially proposed in the Polar year cooperation, now being carried on the summit of Mt. Fuji 3730 meter high above sea level. Some 50 sets of observations were made on 15 days distributed over the period extending from October, 1932 to January, 1933. The value of s came out 0.32 cm (N. P. T.), in the mean showing a general tendency of increasing towards the midwinter. A possible relation of s to the weather type is reserved for a future discussion, though he suggests the importance of considering the effect of scattered reflection of light from the upper surface of the cloud layer attending to a cyclonic system.
It has long been known that the records of the terrestrial magnetic elements obtained by the magnetograph of high sensibility show as a rule numerous trains of more or less regular waves which are called the “ micropulsations ” or “Elementarwellen.” Prof. T Terada pointed out in 1917, that in this kind of terrestrial magnetic variations there occur sometimes a characteristic train of micropuslsations showing a feature like that of “beats” in acoustics. In this paper, is proposed a provisory explanation based on the more or less vertical oscillation of “Kennelly-Heaviside layers.”
In August, 1932, after the kind guidance of Prof. S. Fujiwhara and Prof. R. Sekiguti we made the observations on the damping of the intensity of solar radiation in the water of the Lake Asinoko, which was done by the use of the instrument of our own design and make. The empirical formula determined from our data is as follows; S=1.36e-0.1_??_gr.cal/min._??_ (10th)d: depth in meter.
The present author intends to discuss the precipitation at Kôzimati, Tôkyô, during the period 1924-31, in following articles: 1. Frequercy of the duration of rainfall. 2. Frequency of the beginning of rainfall. 3. Frequency of the ending of rainfall. 4. Diurnal variation of the amount of precipitaion. 5. Monthly variation of the amount of precipitation. 6. Mean duration and monthly duration of rainfall.