摘要：The degree of air pollution in Yoshiwara district, Shizuoka Prefecture, was examined together with that of Shizuoka City district as a control, and the data were analyzed statistically. Air pollution was greater in the Yoshiwara district and the quantity of fallout components seems to increase year by year. Correlation between various data on fallout was clarified and regression equation was calculated for items with strong correlation. Examinations were also made on the degree of correlation between SO3 and fallout components, and distribution of SO3 and fallout components (T%) was clarified. Concentration of SO3 in Yoshiwara area was about one-half of that in Yokkaichi, and showed a peak once each in the morning and afternoon.
