Chap. 26 Vinegar — Lees of Wine
It is a peculiarity of wine, among the liquids, to become mouldy, or else to turn to vinegar. There are whole volumes which treat of the various methods of preventing this.
The lees of wine when dried will take fire and burn without the addition of fuel: the ashes so produced have very much the nature of nitre,1537 and similar virtues; the more so, indeed, the more unctuous they are to the touch.