white, which leisurely and gen∣tly decant: To the remaining bottom put more fresh Rain-water, proceeding as before, and thus continue so long, till nothing but a thick Gummous Matter or Sordes remain: These white or milky Liquors put all together, which put in a still quiet place, free from dirt or Ashes, so will a very white pouder precipitate to the bot∣tom, the Water swimming above, which has imbibed in it self all the nitrous Salt: This Pouder oftentimes wash even so long, till the Acrimony of the Nitre is wholly taken away, then dry, and keep it for use.
§ 3. This Pouder, says he, Is exhibited in hectick Fe∣vers, and in Dropsies with Rob of Elder-berries; chie∣fly it is used in malign and inveterate Ulcers, and in the Scurvy, which neither by Decoctions (of Guajacum) nor by any other more benigh Gallenical Medicaments, are possible to be cured; in all those cases it is a most power∣ful Medicament.
§ 4. In some it operates by Vomit, if the Stomach be very foul and ob••tructed, for for then possibly it may give a Vomit or two, in others it works by Sweat, in some by Urine, and in some by stool: It is given in the beginning of a Hectick, and in Obstru∣ctions of the Womb; in each Body it operates according to the habit and disposition.
§ 5. Methodus Exhibendi. First begin with four or five grains, and encrease the dose gradually, till it begins to nauseate the Stomach, then diminish that larger dose a little, and proceed in the use of it in that proportion for several days.
§ 6. Modus Ʋtendi. In the French Pox, and in inve∣terate Ulcers, let it be exhi∣bited in Decoction of Guaja∣cum, Sarsaparilla, Sassafras, &c. where it operates by Urine, you will presently see inveterate and malign Ul∣cers, in such Persons, to remit of their violence and malig∣nity, and to submit to Oint∣ments, Balsams, Emplasters, &c. Outwardly, It is suc∣cessfully sprinkled upon Ul∣cers, or mixed with Emp••a∣strum Diasulphuris Ru••andi.