96 NOTICES OF THE MEETINGS [June 18, 
lead, cobalt, nickel, and manganese become in it peroxides : the basic 
oxide of silver undergoes the same change. 9. It decomposes 
rapidly the solid and dissolved protosalts of manganese; the hy- 
drated peroxides of the metal being formed, and the acid of the salts 
evolved. 10. It decomposes the solution of the tribasic acetate of 
lead; the peroxide of that metal and the ordinary acetate being 
formed, 11. It rapidly converts the protosalts of iron and tin into 
persalts. 12. It destroys many hydrogenated gaseous compounds ; 
the combinations of hydrogen with sulphur, selenium, phosphorus, 
iodine, arsenic, and antimony are thus affected. It appears to unite 
chemically with olefiant gas in the manner of chlorine. 138. It in- 
stantly transforms the sulphurous and nitrous acids into the sulphuric 
and nitric acids, and the sulphites and nitrites into sulphates and 
nitrates. 14. It changes many metallic sulphurets (as those of lead 
and copper) into sulphates. 15. It decomposes many iodides in 
their solid and dissolved state. By its continued action iodide of 
potassium becomes converted into iodate of potassa. 16. It changes 
both the crystallized and dissolved yellow prussiate of potassa into 
the red salt, potash being evolved. 17. It produces oxidizing 
effects upon most organic compounds, causing a variety of chemical 
changes ; thus guaiacum is turned blue by it. From the above 
enumeration it would appear that Ozone is a most ready and power- 
ful oxidizer, and in a great number of cases acts like Thenard’s 
peroxide of hydrogen, or chlorine or bromine. 
A number of the actions ofthis body, such as the bleaching of 
indigo and litmus, the peroxidation of metals, the conversion of 
sulphurets into sulphates, &c. were shown, to illustrate the chlorine- 
like action of the Ozone; and many illustrations supplied by 
M. Schénbein himself were exhibited. 
With respect to the nature of this body, the two chief 
ideas are—that it is a compound of oxygen analogous to 
the peroxide of hydrogen, or that it is oxygen in an allotropic 
state, 7. e. with the capability of immediate and ready action 
impressed upon it. When an ozonized atmosphere is made as dry 
as possible, and then sent through a red hot tube, the Ozone disap- 
pears, being converted apparently into ordinary oxygen, and no 
water or any other result is produced. This agrees with the known 
fact, that heat prevents the formation of Ozone, and also with 
the idea that Ozone is only oxygen in an allotropic state. To show 
that heat prevents the formation of Ozone a little voltaic battery 
was associated with a fine platina wire helix, insulated, and connected 
with the electrical machine ; at first the circuit between the battery 
and the helix was left incomplete; and then on working the 
machine the brush thrown off from the helix affected the test 
paper, before described, by the Ozone in it; but when the con- 
nexion was complete, so that the helix was ignited, then the 
electrical brush from it had no power of producing any effect of 
Ozone. 
