The chief point advanced by Borrichius, and in which he seems to lay the principal stress, is, the attempt of Caligula, mentioned by Pliny, for procuring gold from Orpiment, (Hist. Nat. 1. xxxiii. c. 4.) But this, it may be observed, makes very little for that author’s pretensions; there being no transmutations, no hint of any Philosopher’s Stone, but only a little gold was extracted or separated from the mineral.
The principal authors on Alchymy are, Geber, Friar Bacon, Sully, John and Isaac Hallandus, Basil Valentine, Paracelsus, Van Zuchter, and Sendirogius.
ALKAHEST, OR ALCAHEST,
In Chemistry, means a most pure and universal menstruum or dissolvent, with which some chemists have pretended to resolve all bodies into their first matter, and perform other extraordinary and unaccountable operations.
Paracelsus and Van Helmont, expressly declare, that there is a certain fluid in nature, capable of reducing all sublunary bodies, as well hemogeneous as mixed, into their ens primum, or original matter of which they are composed; or into an uniform equable and potable liquor, that will unite with water, and the juices of our bodies, yet will retain its radical virtues; and if mixed with itself again, will thereby be converted into pure elementary water. This declaration, seconded by the asseveration of Van Helmont, who solemnly declared himself possessed of the secret, excited succeeding Chemists and Alchymists to the pursuit of so noble a menstruum. Mr. Boyle was so much attracted with it, that he frankly acknowledged he had rather been master of it, than of the Philosopher’s Stone. In short, it is not difficult to conceive, that bodies might originally arise from some first matter, which was once in a fluid form. Thus, the primitive matter of gold is, perhaps, nothing more than a ponderous fluid, which, from its own nature, or a strong cohesion or attraction between its particles, acquires afterwards a solid form. And hence there does not appear any absurdity in the notion of an universal ens, that resolves all bodies into their Ens Genitate.
The Alcahest is a subject that has been embraced by many anthers; e. g. Pantatem, Philalettes, Tachenius, Ludovicus, &c. Boerhaave says, a library of them might be collected; and Werdenfelt, in his treatise de Secretis Adeptorum, has given all the opinions that have been entertained concerning it.
The term Alcahest is not peculiarly found in any language: Helmont declares, he first observed it in Paracelsus, as a word that was unknown before the time of that author, who in his second book, De Viribus Membrorum, treating of the liver, has these rather remarkable words: Est etiam alkahest liquor, magnam sepates conservandi et confortandi, &c. “There is also the liquor Alkerhest, of great efficacy in preserving the liver; as also in curing hydropsical and all other diseases arising from disorders of that part. If it have once conquered its like, it becomes superior to all other hepatic medicines; and though the liver itself was broken and dissolved, this medicine should supply its place.”
It was this passage alone, quoted from Paracelsus, that stimulated succeeding chemists to an enquiry after the Alkahest; there being only another indirect expression, in all his work, relating to it.
As it was a frequent practice with Paracelsus to transpose the letters of his words, and to abbreviate or otherwise conceal them; e. g. for tartar, he would write Sutratur; for Nitrum, Mutrin, &c. it is supposed that Alcahest must be a word disguised in the same manner. Hence some imagine it, and with much probability, to be formed of alkali est; consequently that it was the Alkaline salt of tartar salatilized. This appears to have been Glauber’s opinion; who, in fact, performed surprising things with such a menstruum, upon subjects of all the three kingdoms. Others will have it derived from the German word algeist, that is, wholly spirituous or volatile; others are of opinion, that the word Alcahest is taken from saltz-geist, which signifies spirit of salt; for the universal menstruum, it is said, is to be wrought from water: and Paracelsus himself calls salt the centre of water, wherein metals ought to die, &c. In fact, spirit of salt was the great menstruum he used on most occasions.
The Commentator on Paracelsus, who gave a Latin edition of his works at Delft, assures us that the alcahest was mercury, converted into a spirit. Zwelfer judged it to be a spirit of vinegar rectified from verdigris, and Starkey thought he discovered it in his soap.