Abstract
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.
