The experimental divice for the removal of SO_2 in flue gases is a wet type cylindrical electric precipitator with liquid irrigated glass wall (positive electrode) and a wire at its center producing a corona discharge between them (spacing 2.0cm). The gas was derived from the device analyzed by "Analytical methods for determining total sulphur oxides in flue gases-JIS KO103 (1963)". The results of these experiments are summarized as follws. (1) The characteristics of the SO_2-removal efficiency for the appl