70 LETTEES OF BEEZELIUS 



with errors of translation, so that in some cases its 

 meaning is the exact opposite of that of the German 

 original. 



In my paper the salt obtained by the complete 

 decomposition of potassium iodide by means of ozone 

 was not said to be pure potassium ozonide (although 

 I was certainly inclined at first to think it was that) ; 

 on the contrary it was expressly stated that it con- 

 tained potassium iodate. 1 Also I have nowhere said, 

 as far as I know, that all acids gave with this salt 

 a smell of ozone. I did indeed remark that sulphuric 

 acid set free from it a constituent which had a smell 

 apparently intermediate between that of bromine and 

 that of iodine, and which turns potassium iodide 

 starch paste blue, etc., but I did not venture de- 

 finitely to ascribe this smell to ozone, though I 

 expressed an inclination to believe that it was due to 

 it. Assuming that the salt in question contains 

 some potassium iodate as well as potassium ozonide, 

 I expressed myself to the following effect as to the 

 supposed development of ozone, on pages 116 and 117 

 of the German paper 2 : "The production of ozone 

 from this mixture of salts by means of sulphuric acid, 

 the brown colour which the acid causes, and the 

 evolution of iodine vapours on warming, are satis- 

 factorily explained if we suppose that the salt in 

 question is a mixture of potassium iodate and 



1 Cf. also Berzelius' remarks in the Jahresbericht, vol. xxv. 

 (1846) p. 132. 



3 Schonbein is here referring to the earlier paper : Uler die 

 Erzeugung des Ozons. 



