Distillation of Crystal.
℞. Of the elevated Crystal ℥j. Water o• Nitre and Allom (made) without distillation of each ℥ij. digest all together for three or four Days; then distil, and what shall be distil'd Coagulate; the Coagulum resolve.
Page 59Coagulation must be made over a gentle and small Fire: I this Coagulate be set in a Cellar, it will resolve into Water, which is the Ulti∣mate preparation of Crystal; Dose ℈j.
After this manner as is now shewed in Co∣rals, all other pretious Gemms, are to be pre∣pared.
The greatest virtue of the Rubie is in the Dysentery, and its dose is ℥j. it be crude; But if Reverberated; then its dose is ʒij. If Calcin'd, the dose is ʒj. If Sublimed ʒss. And if distil'd but ℈j.
Also Granates so distil'd make the most powerful Collyrium for the Eyes.
Emralds, if prepar'd by distillation, profit or Pore-blind Haemoptoicks.
Saphyres if prepar'd according to the Third, or Forth preparation; takes away Trembling of the Heart, especially, if distil'd (Dose, grans v.) they remove the Synthena, and Palpita∣tion. The like is to be judged of other Gemms. Bartholomeus Anlicus, hath writ more touching Gemms, and Pretious Stones.