216 Meissner’s Researches upon Electrized Oxygen. 
ceiver of water—ammonium sulphid, hydrosulphuric acid, sul- 
phurous acid—either free or as sodium sulphite—and ammonio- 
ferrous tartrate, were all used with good results, the ozone being 
entirely removed. It is not necessary however, to absolutely 
de-ozonize the oxygen, in order to produce the mist; partial 
absorption will produce it, though it is weaker in proportion to 
the amount of ozone remaining. By using potassio- or sodio- 
ferrous tartrate, instead of the ammonia salt, such a partial ab- 
sorption is effected. The same is true of certain metals, when 
moistened with water; lead, zinc, copper, iron, tin, cadmium, 
antimony, aluminum, and thallium all giving the mist, though 
lead, zine and aluminum are the best for this purpose. Meissner 
compares the mist rising from these metallic bars to the cloud 
which rises from moistened phosphorus. Even carbon, in the 
form of gas-carbon, and sometimes animal charcoal, effects this 
absorption. The noble metals gold and platinum remain com- 
pletely unaltered in both moist and dry ozonized oxygen. 
of moisture, it is so tee converted. Mercury, perfectly dry 
and still, remains unaltered, i 
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with, or — through water, not only without losing, but 
often wit i i 
mechanical or adhesive combination of oxygen and water, 
i c i Eclded, gradually 
, fine fluid drops collecting upon the walls of the 
vessel which when examined are found to be pure water, con- 
taining’ possibly under certain conditions, a trace of hydrogen 
peroxyd.” en passed through strong sulphuric acid, or over 
