Also, thank you, yes, I should add some account of oil extraction which is, as you say, another traditional technique. It is especially used in traditional (pre-industrial) perfumery - enfleurage. But also, of course, the production of oils for liturgy, chrism etc.
Still, I don't detect any sign of it in the Voynich pharmacology which seems devoted to aqueous extraction (on my reading of it.)
Also, I find it is the roots that are conspicuous in the Voynich botanica, especially in the pharmacology sections. There is no sign someone is collecting large quantities of flowers (or seeds). Instead, roots. Generally, you extract oils from flowers and seeds, and bitter principles (and starches) from roots.
I don't doubt there may be floral symbolism, but I'm impressed by the emphasis on roots.
Still, I don't detect any sign of it in the Voynich pharmacology which seems devoted to aqueous extraction (on my reading of it.)
Also, I find it is the roots that are conspicuous in the Voynich botanica, especially in the pharmacology sections. There is no sign someone is collecting large quantities of flowers (or seeds). Instead, roots. Generally, you extract oils from flowers and seeds, and bitter principles (and starches) from roots.
I don't doubt there may be floral symbolism, but I'm impressed by the emphasis on roots.