escape combustion.

Dr. Blochmann has shown the composition of the gases in various parts
of the Bunsen flame to be as follows:

Height above tube. |In tube. |1 inch. |2 inch. |3 inch. |Complete
| | | | |combustion
-------------------------------------------------------------------
Air with 100 vols. | | | | |
gas | 253.9 | 284.7 | 284.5 | 484.3 | 608.8
Hydrogen | 48.6 | 36.4 | 17.7 | 16.1 | Nil.
Marsh gas | 39.0 | 40.1 | 28.0 | 5.7 | Nil.
Carbon monoxide | 2.9 | 2.2 | 19.9 | 12.7 | Nil.
Olefiant gas | 4.0 | 3.4 | 2.2 | Nil. | Nil.
Buteylene | 3.0 | 2.5 | 1.6 | Nil. | Nil.
Oxygen | 52.7 | 52.0 | 21.7 | Nil. | Nil.
Nitrogen | 199.1 | 223.8 | 225.9 | 382.4 | 482.3
Carbon dioxide | 0.8 | 3.5 | 13.0 | 41.7 | 62.4
Water vapor | 3.1 | 11.8 | 45.8 | 116.1 | 141.2
-------------------------------------------------------------------

Which results show that it would be impossible to check the flame
anywhere short of the extreme tip (where complete combustion is
approximately taking place), without liberating deleterious products.
I think I have said enough to show that no gas stove, geyser or gas
cooking stove should be used without ample and thorough means of
ventilation being provided, and no trace of the products of combustion
should be allowed to escape into the air; until this is done, the use
of improper forms of stoves will continue to inflict serious injury on
the health of the people using them, and this will gradually result in
the abandonment of gas as a fuel, instead of, as should be the case,
its coming into general use. The English householder is far too prone
to accept what is offered to him, without using his own common sense,
and will buy the article which tickles his eye the most and his pocket
the least, on the bare assurance of the shopkeeper, who is only
anxious to sell; but when he finds that health and comfort are in
jeopardy, and has discarded the gas stove, it will take years of labor
to convince him that it was the misuse of gas which caused the
trouble. Already signs are not wanting that the employers of gas
stoves are beginning to fight shy of them, and I earnestly hope that
the gas managers of the kingdom will b