330 Meissner’s Researches on Oxygen, Ozone, and Antoxone, 
of HO, it was only necessary to pass CO, into water, mixed 
with BaO,, BaO, CO, and HO, resulting. In this way he ob- 
tained directly, a solution so concentrated that it decomposed 
under the influence of light.’ 
Asa means of detecting HO,, the author found Schénbein's 
reagent, viz: iodid of potassium and starch-paste in conjunction 
with protosulphate of iron, to possess the greatest delicacy and 
to be most characteristic when applied with certain precautions, 
especially when the ferrous salt is employed in very minute 
quantity. As regards the reactions that occur between this Te 
agent and HO,, Meissner after adducing the somewhat contra- 
dictory statements made at different times by Schénbein, is led 
to conclude that HO, is without effect on KI, in neutral solution, 
except in presence of some “ predisposing” agent, like FeO, and 
that contrary to Schénbein’s opinion the first action consists in 
an oxydation of FeO, to Fe,O, and that the deoxydation of HO, 
thus begun, continues in presence of KI after all FeO has 
oxydized and results in the oxydation of KI and destruetion of 
2. ‘he presence of any acid suffices to induce the reacton 
between HO, and KI, instantaneously when the acid is added 
to a mixture of HO, and KI; but after a considerable interval, 
and in a much less marked manner, or even not at all as meas 
ured by the separation of I, when the HO, is mixed with an 
acid previous to the addition of KI. Our author's theory of the 
mode in which the well known power of acids to prevent de- 
eral—but were undeniably those of HO,, while the presence of 
antozone in the spar was equally certain. As to the condition 
in which it there exists, or how it may possibly be produced 7 
grinding, Meissner feels unable to offer any hypothesis. nich 
ooked in vain for evidences of antozone in other minerals WA 
manifest a peculiar odor when submitted to friction. Not even 
in a compact fluor from Ivikaet in Greenland, which has pe 
mentioned as having properties similar to that of Welsen' 
could any be detected. ih 
_ Oxydized oil of turpentine, Meissner found to give the both 
reactions as the Welsendorf fluor. He concludes that 1 90 
* Debray and Balar 
Rend, lv, 736-8). 
d had previously (?) published the same method, (ComP™ 
