Abstract
In order to find a clue to the present situation of the atmospheric pollution in Tokyo, two points near the atmospheric pollution sources in Tokyo city (Kanda and Arakawa) and one in Kawasaki city which seemed to exercise much effect on the pollution in Tokyo city were selected, and the concentration of SO2, CO2 and dust in the open air were observed 5 times per day during a week, from 15th to 21st February,1956. And also, H-CHO and NH3 in the air were observed at the same time respectively in Kanda and Arakawa. Depending on the results obtained, the characteristics of the atmospheric pollution in its source area were investigated. Especially, the SO2 concentration was compared with the concentration and its variation which were observed at 7 localities in Kanda and others last year.
