... but Gump in Germany feels
that since the OA vapor recrystallizes in the air, that you only need a good
particle mask--not organic vapor.

Does this mean that the white vapour that exits the hive during vaporisation
is recrystallising?
Do these crystals fall and adhere to adjacent items such as outer hive
parts, pallets, and beekeepers' clothing?
Could this pose a continuing health hazard for a commercial beekeeper?
Are there immediate signs of oxalic vapour poisoning? We sometimes have
smell of bees being roasted, which is in fact roasted bees on the burner. Do
oxalic vapours have a distintive odour such as with formic?
Peter (vaporizing in the snow)

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