From a statistical investigation the authors have found a clue to the seasonal forecast for the probable deepest snow in the comming winter in Etigo province. They found a high correlation as 0.86±0.04 between the deepest snow in Etigo and the difference of the monthly average of the atmospheric pressure for the preceding November at Hankow in China and at Niigata. They add remarks that if a certain allowance is made for the influence of solar activity the correlation may be raised so high that it seems to be practicable.
The author has noticed that there were intense droughts in Japan in the summers of 1883, 1893, 1903, 1913 and 1923. The regular interval of ten years between them atracted his interest. By comparing the curve of drought with that of sunspot activity (fig. in Japanese P. 156) he found that the two droughts in the nineteenth century correspond to the sunspot maxima and the last two droughts to the minima. One in 1903, however, correspond neither maximum nor minimum of the solar activity, but just in the middle of the minimum to the maximum. The author remarks that, as Mr. Yamazawa has already pointed out the sunspot maximum or minimum has tendency to bring some abnormal weather either drought or coolness in summer to this country. But its sense is not necessarily determinate.