AND SCHONBELNT 49 



no ozone is produced at temperatures at which in 

 atmospheric air it is formed in comparatively large 

 quantities. I need scarcely say that in hydrogen, 

 carbonic acid, ethylene, hydrogen sulphide, etc., no 

 ozone is formed ; but I should perhaps add that the 

 same is the case in nitrous oxide. It is further a 

 strange fact that the luminescence of phosphorus 

 stands in the closest possible connection with the 

 production of ozone and with the presence of nitrogen ; 

 but the limits of my space prevent me from going 

 further into this question, and therefore I take the 

 liberty of referring you to a memoir 1 which will 

 shortly appear in print, in which I have described 

 the results of my experiments in detail. As already 

 stated, the ozone which is obtained by the electrolysis 

 of water has every one of the properties of that which 

 I have prepared from phosphorus and atmospheric air, 

 so that not the slightest doubt remains as to the 

 identity of the two bodies. But that the strongly 

 smelling substance, produced by the discharge of 

 ordinary electricity, should be identical with chemical 

 and voltaic ozone is a fact which is as singular as it 

 is now (in my opinion, at least) unquestionable. The 

 experimental proofs of the correctness of my assertion 

 are as follows: 1. The bleaching power of the sub- 

 stance produced by the electric discharge. The 

 accompanying strip of paper marked No. 1 2 has been 



1 The book mentioned above, on the chemical preparation of 

 ozone. 



2 This and the other strips are still attached to the letter, and 

 show clearly the similarity of the bleaching action. 



