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.
I shall only remark that it is this pyroligneous acid which penetrates smoked meat and fish, that it has an effect on leather which it hardens, and that thermolampes are likely to render tanning-mills unnecessary, by furnishing the tan without further trouble. But to return to the aeriform principle.
This was the third time of its being open to the public. As it is of a novel kind, some account of it may not be uninteresting. In French, it is denominated THERMOLAMPES, or stoves which afford heat and light on an economical plan. The author of this invention, for which a patent has been obtained, is M. LEBON, an engineer of bridges and highways.