Prof. Schinbein on the Allotropic Modifications of Oxygen. 21 
peroxyd of barium, the nitrate of the protoxyd of manganese 
being formed in the first case, and in the second, besides this 
salt, ‘the nitrate of baryta, It is baniy poocnnny to state, that 
hk a similar result, nitrate of baryta and oxyd of chromium 
a boi and O disengaged. 
ou add to a mixture of any peroxyd salt of iron and 
ee ‘el ferro-sesquicyanuret of potassium (both substances dis- 
solved in water) some peroxyd of hydrogen, prussian blue will 
be thrown down and inactive oxygen set free. On introducin 
into a mixture of nitrate of peroxyd of iron and. the ferro-ses- 
quicyanuret of oe the peroxyd of barium, a similar reac- 
tion takes £ aries prussian blue, nitrate of bar} yta, &c., being 
inactive Scien eliminated. yo these facts it 
ess that, under certain conditions, even peroxyd of iron and 
2 or BaO? are capable of catalyzing each other into FeO 
and HO, or BaO and O. 
5. Under certain circumstances PbO? or MnO? are soluble in 
nO, inactive apace tebe Sane 
6. It is a well known fact that the oxyd of silver = Ag( =O), 
or the peroxyd of that metal =Ag(— O)2, and the peroxyd of 
hydrogen —HO+(+0), catalyze each other into metallic silver, 
water and inactive oxygen. Other ozonids such as PbO+(— O) 
or MnO+(— 0), on being brought in contact with HO+(+0), 
are transformed into PbO or MnO, HO and O. Now the per- 
oxyd of barium =Ba0+(+0), acts like Rosse) Po you 
ur water xem an intimate mixture of AgO, o 2 and 
aOQ?, rn ai y apebeserped of inactive oxygen spe 
2 being reduced to ¢ silver 
realy v euictae the first part 44 my yee T must = 
omit to state the general fact, that the oxygen cnn ina 
cases of reciprocal catalysis of oxy-compounds, beha etary 
respect like inactive oxygen. 
re is another set of chemical phenomena, in my opinion 
‘ice connected with the polar states of the active oxygen con- 
tained i in the two opposite. of peroxyds, It is known that 
