The cataphoresis of gas bubbles in water

Abstract

The first observations on the electrification of liquid-gas interfaces were ode by Quincke (‘ Pogg. Ann.,’ vol. 113, p. 513 (1861)). He found that the sage of an electric current through a capillary tube containing water caused movement of the surface of the latter, which was exactly proportional to quantity of electricity passed. He also noted that the passage of a current though a liquid containing gas bubbles caused the latter to move towards an electrode. In his experiments the motion of these air bubbles was inestigated in narrow glass capillary tubes, and the bubbles were found to move towards the anode when submerged in water, but towards the cathode en the water was replaced by turpentine. Further work on the electrification of gas bubbles was carried out by Taggart (‘ Phil. Mag.,’ vol. 27, p. 297 (1914) ; vol. 28, p. 367 (1914)). The rrow capillary tubes used by Quincke for this purpose are not very satisfactory, ache bubble tends to stick to the sides of the tube, making it almost impossible obtain quantitative results.