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.

Cornachinus his Medicinal Powder, as it was Prepared by Sir K. Digby's Order in his Laboratory.

TAke Regulus of {antimony}, and of pure Salt-petre, ana ℥iv. mingle them well toge∣ther in subtil Powder, and cast them into a red-hot Crucible, and make them burn by casting in a fiery Coal, which repeat as often as it consumeth; for without that the Salt-petre will not burn, there being no more Sulphur in the {antimony} to set it on fire. Keep it thus in fusion in a reverberating heat for at least an hour, stirring the Matter often with an Iron Rod; then let it cool. This must not be edulcorated as common {antimony} Dia∣phoretick, but the fixed Salt of Salt-petre must remain with it, and must by no means be separated from the {antimony}, for in that Sir K. says, consisteth the Vertue against Fevers. Of this we gave with the Scammony and Cream of Tartar, ana gr. x. diminishing and increasing the Dose according to Age and strength.

Hartman.) Sir K. recommended this to me as a very good Purge, telling me, that I might make use of it whensoever I had oc∣casion.

The best way to make the Regulus of {antimony}, is, to put first into the Crucible the Salt-petre and Tartar, and when they are well melted, put in the {antimony}, and proceed in the rest in the usual manner: Thus you shall shall have six or seven pound, or more, of every pound of Antimony. Likewise to make a Martial Regulus, put the {antimony} first in∣to the Crucible; and when it is in perfect fusion, then put in the Mars.