The heat-absorbent chamber is for an incandescent light, which is accommodated in a glass casing (1) afterwards closed by screwing a base (2) of glass onto it. The light is lit by insertion of a match through an air hole (3) and rubbing it against a striking surface in the latter. The air heated by the light rises through outlet holes (6) at the top, while cold air flows in through the holes at the bottom.
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