The question then arises: What are the means employed for this object? M. Schoenbein believes that he has found it in the action of ozone, which is continually formed by the electricity of the atmosphere, and is known to be a most powerful agent of oxidation, causing serious modifications of organic bodies, and, consequently, of their physiological action. 'To assure myself,' he pursues, 'that ozone destroys the miasma arising from the decomposition of animal matters, I introduced into a balloon containing about 130 pints of air, a piece of flesh weighing four ounces, taken from a human corpse, and in a very advanced state of putrefaction. I withdrew it after a minute; the air in the balloon had acquired a strong and very repulsive odour, shewing that it was charged with an appreciable quantity--at least for the smell--of miasm caused by the putrefaction. 'To produce ozone, I introduced into the infected balloon a stick of phosphorus an inch long, with water sufficient to half cover it. At the same time, for the sake of comparison, I placed a similar quantity of phosphorus and water in another balloon full of pure atmospheric air. After some minutes, the reaction of ozone in the latter was most evidently manifested, while no trace of it was yet apparent in the former, which still gave off an odour of putrefaction. This, however, disappeared completely at the end of ten or twelve minutes, and immediately the reaction of the ozone was detected.' The conclusion drawn from this experiment is, that the ozone destroyed the miasm by oxidation, and could only make its presence evident after the complete destruction of the noxious volatile substances. This effect is more strikingly shewn by another experiment.