A choice collection of rare secrets and experiments in philosophy as also rare and unheard-of medicines, menstruums and alkahests : with the true secret of volatilizing the fixt salt of tartar / collected and experimented by the honourable and truly learned Sir Kenelm Digby, Kt., Chancellour to Her Majesty the Queen-Mother ; hitherto kept secret since his decease, but now published for the good and benefit of the publick by George Hartman.

Lapis ignis, for the renovation of Mankind, by the three Principles of Nature, Salt, Sulphur, and Mercury.

TAke {antimony} Mineral, pulverize it, and Cal∣cine it in a close Reverberatory, with sufficient, but moderate heat, so that it melt not, in twenty four hours it will be Calcined, and will be a gray Powder. Take of this {antimony} Calcined, and of raw {antimony} Mineral, ana lbj. melt them together in a Crucible; when they are well melted and incorporated, pour it out into a Copper or Brass Kettle, and it will be Glass of {antimony}, which needeth not to be clear. If you did not add the {antimony} Mineral, the Calcined {antimony} would not melt. Pulverize this Glass, and grind it upon a Marble stone till it be an impalpable Powder, which put into a Vial, and pour upon it distilled Vine∣gar alcalised with its fixt Salt, digest in Sand; when you see the distilled Vinegar coloured of a Golden colour, decant the clear, and put fresh distilled Vinegar upon the Glass, and digest as before. Repeat this till you have extracted all the Tincture out of the Glass: Then filter the Tincted distilled Vi∣negar, and put it into a Recort; distill with

a gentle fire in Sand until you see there re∣main a Liquor like a deep-red Oyl in the bottom of the Retort, and that you see some drops appear in the neck of the Retort, which is a sign that all the distilled Vinegar is come over. Pour upon this Oyl Tartarised S. V. digest and circulate for three or four days, or more: Then draw off the S. V. gently in B. and as soon as you see any red drops appear, change the Recipient, putting on another; then distill over all the remaining red Oyl to dryness. This Oyl will be very red, and very precious, and is the true Oyl and Sulphur of Antimony, which is a wonderful Medi∣cine against the Plague, and all Diseases.