372 Mr. Williamson on Ozone. 



It is possible that these substances may be combined into 

 proximate constituents, and the alloy be a compound of these, 

 but we have no data for so grouping them. On re-melting, 

 however, a portion of these crystals, the mass separated into 

 two portions, — a metal considerably more fluid, and a com- 

 pound more infusible than the crystals; these I have not 

 examined. ; .- 



From the preceding analysis, it will be seen that a portion 

 of alloy amounting to but 10 per cent, is capable of retaining 

 in combination 90 per cent, of zinc : this will account for the 

 large portion of difficultly fusible metal in a pasty state which 

 frequently rises to the top of the melting-pot in fusing com- 

 mercial zinc, and which is probably an alloj. of jsia9jcomlj)inejl 

 with but a small portion of other metal>^ //xcaaaaan zzmioot 



•'•' i«.'i ._Hi,l ,111, f'\lOl1l i ', x:=: 



LVIII. Some Experiments on Ozone. ' 



" ' ^'^'^^ '% A. W. WittiAMSON, Esq.*> «99tJ eiie mh 



I Tf* naS^ teen satisfactorily proved by MarigiiacYj'^ffi^ ^^e 

 phaenomena attributed to ozone have no connexion with 

 the presence of nitrogen. He finds that the ozone odour may 

 be developed in liquids free from nitrogen as well as in those 

 which contain that element. He decomposed by the voltaic 

 current a portion of water from which atmospheric air was 

 carefully excluded, and found that the peculiar smell of ozone 

 was given off, as abundantly after a continuance of the action 

 for several days, when a quarter of the liquid had disappeared 

 in the form of gas, as at the beginning of the decomposition. 

 Marignac confirms Schonbein's statement, that the odorous 

 matter in air acted upon by phosphorus, is identical with that 

 present in the oxygen set free by the electrolytical decompo- 

 sition of water; and indeed recommends, as the most con- 

 venient way of preparing ozone, to pass atmospheric air over 

 phosphorus. The substance made use of in his researches 

 was thus prepared. ' ^ 



The object of the experiments I am^a()Oti? to describe was 

 to obtain some explanation of the phaenomena which gave 

 rise to the supposition of the existence of such a body as ozone. 

 The poles of a Bunsen's battery, consisting of four elements, 

 were plunged into sulphuric acid diluted with three volumes 

 of water. The hydrogen from the copper plate at which it 

 was evolved was allowed to escape into the atmosphere. The 

 oxygen which was evolved upon a plate of platinum was col- 



* Coranmnicated by the Chemical Society i h§y.ing.been Tg ad May^l^, 



t 'Comptes Rendus ti fJcadimie, Mars isi^^^l^'^ •'"9"P^^"2.nl 



