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the whole body of facts which I have been lucky enough toascertain, render it highly probable, if not certain, that ozone isderived from azote, that is to say that the latter body is aCompound consisting of ozone and hydrogen. Starting fromthat conclusion or if you like supposition the disengagement ofOzone taking place under circumstances apparent[l]y so widclydiffering from each other, is very easily accountcd for. i) Thedisengagement of Ozone in atmospheric air by means of commonelectricity. If an electrical discharge takes place in the commonair, the oxigen of the latter unites with the hydrogen of azoteand sets Ozone at liberty. Should hydrochloric acid happento be a constituent part of our atmosphere instead of Azote,a series of phenomena would take place at the points of emissionof an electrical machine closely resembling those which \ve ob-serve now at those points. A smcll of Chlorine would makeits appearancc there, a stripe of gold held into the electricalbrush would become negatively polarized, starch mixt up withJodide of potassium would turn blue, the yellow ferro-eyanidebe changed into the red one, organic coloring matter be bleached,etc and the whole series of the phenomena mentioned, renderedimpossible to take place, if the points of emission were surroundedby an atmosp[h].ere holding some sulphuretted hydrogen, sul-phurous acid, vaporous phosphorus, etc dissolved. Indecd thedisengagement of ozone at those points is entirely stopt bymixing up the atmosphere with very small quantities of thegazeous substances last mentioned, as you will learn from mymemoir.

2) The disengagement of ozone by the slow action ofPhosphorus upon the atmospheric air. Phosphorus being simul-taneously in contact with Azote and Oxigen causes the latterto unite with the hydrogen of azote, whilst another portion ofoxigen combines with phosphorus to form phosphorus acid.Ozone is set at liberty, part of which rcacts however uponphosphorus, forming ozonide of phosphorus, whilst another part

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