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.

Observations.

THE Athanor was of a digestive Fur∣nace, with a Tower for the Coals, and between both, there were two Registers of heat, the one gave the heat under the Ves∣sels, and the other above: The Matrass stood in Sand in a Bason of Copper, which held ten or twelve Matr. At the beginning the {fire} was given only below, and so gen∣tle, that the ☿ never Sublimed. The Bason with the Matr. was covered with a cover like a Dome, and after that the heat was given

also above, and that stronger than before: And it ought to be always continued with∣out interruption. After nine M. digestion, all the ☽ will be transmuted into ☉, and be∣sides that, you shall have an augmentation of a third part of ☉.

Note, That you must not put above ℥ij. of Matter into each Matrass.

The ☉ which he used in this Operation, was three times purified by {antimony}.

He told me since, that the greater pro∣portion of Reg. you put to the ☽, the better your work will succeed, and you shall have the more ☉, and the sooner.

Hartman.) The said Father B. de B. was the Apothecary in the Convent of the Capu∣chins at Lyons: He was an able Chymist, and had been for some Years Operator with the Chancellor of France, in his Laboratory. When I went from Paris to Italy, after Sir Kenelm's Death, passing through Lyons, I went to see him in the Convent of the Capu∣chins, where I had some Discourse with him concerning this work; he confirmed it to me, assuring me that he had done it, and that it was a real truth, and that is all I know of it.