Hmmm, I have seen some illustrations of distillation plants (though mostly recent date), but this one would make no sense at all in terms of construction. The connection of upper and lower part seems to me quite strange. But maybe it's just an inability to draw.
@Aga: There are also good quality illustrations from the late 15th century such as this one:
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Anonymous, Ymage de vie, plus miscellaneous alchemical receipts, Late 15th century
@Aga: There are also good quality illustrations from the late 15th century such as this one:
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Anonymous, Ymage de vie, plus miscellaneous alchemical receipts, Late 15th century