Point XXI, and XXII

Mistresses of Families, may of it prepare fine Soap or Wash:balls, far exceeding the Venetian. Houshold Maids, may with it scour their Metalline Vessels, so as to render them neat and beautiful.

That fixed Nitre will wash and purifie Linen cloth beyond all Soap, no Man will deny, who comprehendeth the matter, concerning which thing, the Ancients have written much, and not in vain, calling Nitre the Soap of the wise, but not for the washing of Womens Linen, but for the intrinsecal purifying of the imperfect Metals: Their External Purgation may also be performed by help thereof, so that the twenty second Point is also verified.