330. Notice from Dr. Robert Hare. 
explosion. Of this I conceive I have discovered the explanation. 
By a great number of experiments, performed with the aid of my 
- barometer gauge Eudiometer, I have ascertained ‘that if during 
the explosion of the gaseous elements of water any gaseous or 
volatile inflammable matter be present, instead of condensing 
there will be a permanent gas formed by the union of the nas- 
cent water with the inflammable matter. Thus two volumes of 
oxygen, with four of hydrogen, and one of olefiant gas, give six 
volumes of permanent gas, which burns and smells like light 
carburetted hydrogen. ‘The same quantity of the pure hydrogen 
and oxygen with half a volume of hydric ether gives on the aver- 
age the same residue. One volume of the new hyponitrous ether 
under like circumstances produced-five volumes of gas. =~ 
An analogous product is obtained when the same aqueous ele- 
ments are inflamed in the presence of an essential oil. With oil of 
turpentine a gas was obtained. weighing per hundred cubic inches 
16,3, grs., which is nearly the gravity of light carburetted hydro- 
gen. ‘The gas obtained from olefiant gas, or from ether, weighed 
on the average, per the same bulk 13,%, grs. The olefiant gas 
which. I used weighed per hundred cubic inches only 30,5 grs. 
Of course if per se expanded into six volumes it could have 
weighed only one sixth of that weight, or little over five grains 
per hundred cubic inches. - There can therefore be no doubt that 
the gas obtained by the means in question, is chiefly constituted 
of water, or of its elements in the same proportion H?O0. 
_ With a volume of the new ether, six volumes of the mixture 
of hydr and oxygen give on the average about five residual 
volumes. The gas created in either of the modes above men- 
tioned does not contain carbonic acid, and when generated from 
olefiant gas appears by analysis to yield the same quantity of 
carbon and hydrogen as that gas affords before expansion. 
- These facts point-out a source of error in experiments, for ana- 
lyzing gaseous mixtures by ignition with oxygen or hydrogen, in 
which the consequent condensation is,appealed to as a basis for an 
estimate. It appears that the resulting water may form new pr0- 
ducts with certain volatilizable substances which may be i 
-— the account of the proceedings of the Section, ul lis het 
in the Atheneum, it appears, that after my letters in. which: 
facts above meted were stated, was read, a aug] 
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