110 Journal of the Asiatic Society of Bengal. {April, 1911. 
tion tests, however, hydrogen peroxide was found to be absent. 
with a solution of Barium nitrite, the beaker water having 
some hydrazine sulphate dissolved in it. As the two solutions 
came in contact with each other, there was a slow evolution of 
gas observed, the evolution increasing with time. The gas was 
allowed to collect over night. A rough analysis of the gas 
next morning showed that it was a mixture consisting of 
almost equal proportions of nitrogen and nitrous oxide. As 
will be shown later, this proportion was a mere chance, and the 
large volume of water over which it was collected dissolved 
out a considerable amount of the soluble gas, namely nitrous 
oxide. Starting with this preliminary observation, accurate 
experiments were next made in the following way: A fairly 
strong solution of barium-nitrite (the barium nitrite available 
in the market being found rather impure, a pure solution ob- 
tained by the interaction of Silver Nitrite and Barium Chloride 
Mercury, and a small pellet of Hydrazine sulphate in excess 
was introduced at the bottom. As soon as the hydrazine salt 
and vigorously shaken up until all the nitrous oxide was dis- 
solved and the volume constant. On re eating the same 
experiment, it was found that although the volume of nitrogen 
gas volume varied also, increasing with the concentration of the 
Barium Nitrite and diminishing with the dilution. The diver- 
state. In an actual ex 
: riment, by using a d 
rite and employing the minimum quan- 
