ATOMIZATION, ELECTRICAL, a process for the pro duction of stable colloidal solutions of metals. An electric arc is passed between electrodes of pure metal in distilled water con tained in a vessel made of practically insoluble material. Faraday probably was the first to employ the electric arc to produce finely dispersed gold, but Bredig developed the method here described. Svedberg used the oscillating discharge from an induction coil and greatly reduced the current density, producing some hydrosols and olganosols. (See COLLOIDS.)