A French gentleman, M. Maratuch, has found by experiments, if three
frames of wire are placed near the base of the chimney, about one foot
apart, whilst no flame will pass through them, the draught will not
be impaired. As most of the soot lodges on the uppermost wire, but
little on the second, and none on the third, he suggests that a brush
be applied daily to keep them clean, and the chimney will never want
sweeping.