Mike-- I mistyped one thing: should not have said 'some drachma of urine'. I meant to be writing 'a drachma of urine'. I don't know what the measurement is exactly, but a drachma was a unit of weight. So it seems that it was really just urine. a whole drachma of it...
As for the powder vs root, I see no reason that the little particulates and such cant be filtered out, either prospectively as Brent suggested in a tea bag, etc, or after the bulk of the powder has settled at the bottom, as SKB suggested.
