2.201 4.966
Carbon monoxide. 1.189 0.006
Oxygen. 2.300 1.430
Marsh gas. 0.072 0.003
Hydrogen. 2.888 0.008
Acetylene. 0.036 Nil.
------- -------
100.000 100.000
The gases leaving the luminous flame show that the diluting action of
the nitrogen is so great that considerable quantities even of the
highly inflammable and rapidly burning hydrogen escape combustion,
while the products of incomplete combustion are present in sufficient
quantity to account perfectly for the deleterious effects of gas
burners in ill-ventilated rooms. The analyses also bring out very
clearly the fact that, although the dilution of coal gas by air in
atmospheric burners is sufficient to prevent the decomposition of the
heavy hydrocarbons with liberation of carbon, and so destroy
luminosity, yet the presence of the extra supply of oxygen does make
the combustion far more perfect, so that the products of incomplete
combustion are hardly to be found in the escaping gases.
These experiments are of the gravest import, as they show more clearly
than has ever been done before the absolute necessity for special and
perfect ventilation where coal gas is employed for the illumination of
our dwelling rooms.
When coal gas was first employed during the early part of this century
as an illuminating agent, the low pitch of the old fashioned rooms,
and the excess of impurities in the gas, rendered it imperative that
the products of combustion of the sulphur-laden gas should be
conducted from the apartment, and for this purpose arrangements of
tubes with funnel shaped openings were suspended over the burners.
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