>Sometime around 1900, in the heart of South Moravia, the Mrštík brothers apply light, perforated sheet metal chimneys to the French flight lockable entrance.
I found a resource for this question and implementation. According to her, it is an invention described as aérateurs de M. Gouttefangeas.
It is a kind of aerators, a hive aeration system.
J.Roos
Moyenmoutier (Vosges)
Journal Title
L'Apiculture française; revue éclectique d'apiculture...
Publication Details
Paris,
Year
1907-1908
p.4-9
Gustav Palan
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