It is in the erudite writings of the great Arabian physician, Gebir—that is, Abu Moussah Djafar, surnamed Al Sofi, or The Wise—that the science of alchemy, or chemistry (at first the two were identical), first assumes a definite shape. Gebir flourished in the early part of the eighth century, and wrote, it is said, upwards of five hundred treatises on the philosopher’s stone and the elixir of life. In reference to the latter mysterious potion, which possessed the wonderful power of conferring immortal youth on those who drank of it, one may remark that it was the necessary complement of the philosopher’s stone, for what would be the use of an unlimited faculty of making gold and silver unless one could be sure of an immortality in which to enjoy its exercise? Gebir’s principal work, the ‘Summæ Perfectionis,’ containing instructions for students in search of the two great secrets, has been translated into several European languages; and an English version, by Richard Russell, the alchemist, was published in 1686.
Gebir lays down, as a primary principle, that all metals are compounds of mercury and sulphur. They all labour under disease, he says, except gold, which is the one metal gifted with perfect health. Therefore, a preparation of it would dispel every ill which flesh is heir to, as well as the maladies of plants. We may excuse his extravagances, however, in consideration of the services he rendered to science by his discovery of corrosive sublimate, red oxide of mercury, white oxide of arsenic, nitric acid, oxide of copper, and nitrate of silver, all of which originally issued from Gebir’s laboratory.
Briefly speaking, the hypothesis assumed by the alchemists was this: all the metals are compounds, and the baser contain the same elements as gold, contaminated, indeed, with various impurities, but capable, when these have been purged away, of assuming all its properties and characters. The substance which was to effect this purifying process they called the philosopher’s stone (lapis philosophorum), though, as a matter of fact, it is always described as a powder—a powder red-coloured, and smelling strongly. Few of the alchemists, however, venture on a distinct statement that they had discovered or possessed this substance.
The arch-quack Paracelsus makes the assertion, of course; unblushing mendacity was part of his stock-in-trade; and he pretends even to define the methods by which it may be realized. Unfortunately, to ordinary mortals his description is absolutely unintelligible. Others there are who affirm that they had seen it, and seen it in operation, transmuting lead, quicksilver, and other of the inferior metals into ruddy gold. One wonders that they did not claim a share in a process which involved such boundless potentialities of wealth!
Helvetius, the physician, though no believer in the magical art, tells the following wild story in his ‘Vitulus Aureus’:
On December 26, 1666, a stranger called upon him, and, after discussing the supposed properties of the universal medicine, showed him a yellow powder, which he declared to be the lapis, and also five large plates of gold, which, he said, were the product of its action. Naturally enough, Helvetius begged for a few grains of this marvellous powder, or that the stranger would at least exhibit its potency in his presence. He refused, however, but promised that he would return in six weeks. He kept his promise, and then, after much entreaty, gave Helvetius a pinch of the powder—about as much as a rape-seed. The physician expressed his fear that so minute a quantity would not convert as much as four grains of lead; whereupon the stranger broke off one-half, and declared that the remainder was more than sufficient for the purpose. During their first conference, Helvetius had contrived to conceal a little of the powder beneath his thumb-nail. This he dropped into some molten lead, but it was nearly all exhaled in smoke, and the residue was simply of a vitreous character.
On mentioning this circumstance to his visitor, he explained that the powder should have been enclosed in wax before it was thrown into the molten lead, to prevent the fumes of the lead from affecting it. He added that he would come back next day, and show him how to make the projection; but as he failed to appear, Helvetius, in the presence of his wife and son, put six drachms of lead into a crucible, and as soon as the lead was melted, flung into it the atoms of powder given to him by his mysterious visitor, having first rolled them up in a little ball of wax. At the end of a quarter of an hour he found the lead transmuted (so he avers) into gold. Its colour at first was a deep green; but the mixture, when poured into a conical vessel, turned blood-red, and, after cooling, acquired the true tint of gold. A goldsmith who examined it pronounced it to be genuine. Helvetius requested Purelius, the keeper of the Dutch Mint, to test its value; and two drachms, after being exposed to aquafortis, were found to have increased a couple of scruples in weight—an increase doubtlessly owing to the silver, which still remained enveloped in the gold, despite the action of the aquafortis.
It is obvious that this narrative is a complete mystification, and that either the stranger was a myth or Helvetius was the victim of a deception.
The recipes that the alchemists formulate—those, that is, who profess to have discovered the stone, or to have known somebody who enjoyed so rare a fortune—are always unintelligible or impracticable. What is to be understood, for example, of the following elaborate process, or series of processes, which are recorded by Mangetus, in his preface to the ponderous ‘Bibliotheca Chemica’ (to which reference has already been made)?
1. Prepare a quantity of spirits of wine, so free from water as to be wholly combustible, and so volatile that a drop of it, if let fall, will evaporate before it reaches the ground. This constitutes the first menstruum.