This is an excerpt from Le Viandier de Taillevent
(France, ca. 1380 - James Prescott, trans.)
The original source can be found at
James Prescott's website
To cure wine turned ropy. For a Paris hogshead, boil a potful of wheat until it has burst, drain it, and put it to cool. Take some well beaten egg whites, skim them, and put everything in the barrel. Stir with a short stick (split into 4 at the end) which does not reach the dregs, so that they are not disturbed. Hang a pound of ground bastard lovage in a cloth sachet by a thread in the bunghole of the barrel.