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.

Tincture of Mars.

DIssolve filings of ♂ in A. F. made of Vitriol, Nitre, Allom, and Cinaber; then pour upon this dissolution distilled Vi∣negar, double the weight of the A. F. shake it well together, and digest in B. for three days, then decant the clear, and filter it; evaporate it gently: Then grind it with two parts of ☿ {subli}mate, Sublime the ☿ from it four times; then dissolve it again in distilled Vinegar, and evaporate it gently; then dis∣solve it in distilled Rain {water}, and congeal it

gently: Repeat this last solution till it is not corrosive upon the Tongue; then in ℥iv. of Rectified Spirit of Vitriol dissolve ℥j. of this Sulphur of ♂, and ℥ij. of Sulphur of ☉ made the same way, except the first solution of the ☉, which must be an A. R. made of Salt, Nitre, and Vitriol; mix these two last solu∣tions together, and digest in fimo, then co∣agulate it gently, dissolve again in Spirit of Vitriol, and coagulate: Repeat this seven times, and if any feces remain at last, leave them out. Try this Medicine upon a hot Plate of ☽, if it penetrate and tinge it through∣ly without smoking, it is a sign of its per∣fection; but if it smoak, you must dissolve it again, and gently coagulate. Then melt ℥j. of ☉, and cast upon it by little and little ℥j. of this Medicine, and when all is enterd and incorporated with the ☉, cast it in In∣got, and you shall have a Matter as brittle as Glass, and transparent like a dark Gra∣nade stone, and fusible as ♄. Then melt fine ☉ and fine ☽ ana, and project of this Medicine upon it, and you shall have pure ☉.