262 Scientific Intelligence. 
it. In less than a minute the test will show ozone in the air of the 
_ Ozone when obtained by the three very different processes described 
is identical in every respect: its properties are as follows: 1. It is a 
mine, and the metallic peroxyds, it is a powerful electromotive sub- 
Stance. 5, It discharges vegetable colors with a chlorine-like Pei 
s 4 mbines 
der ordin ircumstances, but does when lime water is present ; 
and nitrate of lime is formed from which nitre may be readily obtained 
t common an peratures it acts powerfully upon 
low tem 
most metallic bodies, producing the highest degree of oxydation they 
are capable of. Lead and even silver is carried at once to the state of 
d tin 
; yd 
being formed. 11. It rapidly conferts the protosalts of iron ao 
pe persalts. 12. It destroys magiy hydrogenated gaseous compoun®> 
14. It changes many metallic sulphurets (as those of lead and tt 
into sulphates. 15. It decomposes many iodids in their solid an een 
