no ashes, no wood, to soil your apartments. By night, as well as by
day, you can have a fire in your room, without a servant being
obliged to look after it. Nothing in the _thermolampes_, not even the
smallest portion of inflammable air, can escape combustion; while in
our chimnies, torrents evaporate, and even carry off with them the
greater part of the heat produced.

"The advantage of being able to purify and proportion, in some
measure, the principles of the gas which feeds the flame is," said M.
LEBON, "set forth in the clearest manner. But this flame is so
subjected to our caprice, that even to tranquilize the imagination,
it suffers itself to be confined in a crystal globe, which is never
tarnished, and thus presents a filter pervious to light and heat. A
part of the tube that conducts the inflammable air, carries off, out
of doors, the produce of this combustion, which, nevertheless,
according to the experiments of modern chymists, can scarcely be any
thing more than an aqueous vapour.

"Who cannot but be fond of having recourse to a flame so subservient?
It will dress your victuals, which, as well as your cooks, will not
be exposed to the vapour of charcoal; it will warm again those dishes
on your table; dry your linen; heat your oven, and the water for your
baths or your washing, with every economical advantage that can be
wished. No moist or black vapours; no ashes, no breaze, to make a
dirt, or oppose the communication of heat; no useless loss of
caloric; you may, by shutting an opening, which is no longer
necessary for placing the wood in your oven, compress and coerce the
torrents of heat that were escaping from it.

"It may easily be conceived, that an inflammable principle so docile