In the first report, We tride to express the curve of beriberi in Osaka City, by composition of two periods which have one year normal cyclic distribution. But the phase of the second period slipped down by half a year. The first period was supposed to have the casue of outbreak in summer while the second period in winter.
The temporal distribution curve is expressed by: f(t)=C1_??_G1(t-nh)+C2_??_G2(t-nk)
In this report we calculated the destribution curve of the death rate of beriberi above one year excepting the infant beriberi, in three years from 1933 to 1935, on the date of total Japan, applying the same formula. In this result, we can get the distribution curve shown in the graph (Fig. 1), and find out that the actual value and the calculation coincide well. Judging frog this facts too, we can imagine that there will be some reason easy to cause beriberi death in winter, even though excepting the infant beriberi under year, on which it has been said that the infant beriberi often occurs in cold winter season.
Then we calculated the distribution curve of the death rate of beriberi in five cities (S appor, Tokyo, Osaka, Kobe and Fukuoka) to find out the geographical differences according to the areas, concerning the weight of summer cyclic distribution and that of winter one. In the result try e found that the actual value and the calculation almost coincided well inz these cities (Fig. 2-4). Coniparing the summer weight C1 with the winter weight C2, we found that the winter weight C2 in Sapporo City, shown 0.35, is larger than that of other cities. On the other hand, the summer wveight Cl in this City is only, 1.8 tines larger than the winter wight C2. even, though in other cities the summer weight C1 are 3 or 7 times larger than the winter ones. The constants of C, δ, q and m in five cities are shown in the table.
Although it is difficult to say exactly from the above-mentionedd data, we can imagine that there will be some relation between low temperature environment and the outbreak of beriberi, judging from the fact that Sapporo City which is situated in northern Japan, has a large winter weight C2 eomparde with the other area.
