LONG before Schönbein discovered ozone, electricians who had been in the habit of employing Franklinic or statical electricity as a therapeutic agent, had discovered that the electrical aura, as they termed it, or the current of air proceeding from an electrified point, possessed decided physiological properties, and the effect appeared to be the same whether, on the single fluid hypothesis, the electrical current or breeze passed from the point to the animal surface, or vice versâ. The physiological effects principally noticed were the power of this breeze to allay chronic inflammatory actions in delicate organs, such as inflamed eyes, or to relieve pain arising from a decayed tooth ; but they were most remarkable in the curative effect produced on obstinate ulcers, when the electrified current or aura was daily thrown upon their surfaces for some minutes. The rationale of this process was not understood, and electricians were contented to accept the facts without being able to explain them.