5. The greatest rage for alchemy prevailed between the tenth and sixteenth centuries. The writers on this subject who appeared during that period, are very numerous, most of whom are unintelligible, except to those initiated into the art. Many of them, however, display great acuteness, and an extensive acquaintance with natural objects. They all boast, that they are in possession of the philosopher's stone, and profess the ability of communicating a knowledge of making it to others.
6. Their writings and confident professions gained almost implicit credit, and many unwary persons were thus exposed to the tricks of impostors, who offered to communicate their secret for a pecuniary reward. Having obtained the sum proposed, they either absconded, or wearied out their patrons with tedious and expensive processes.
7. Chemists, for a long time, had supposed it possible to discover, by their art, a medicine which should not only cure, but prevent all diseases, and prolong life to an indefinite period, even to immortality. This notion gradually becoming prevalent, the word chemistry acquired a more extensive application, and embraced not only the art of making gold, but also that of preparing "the universal medicine." Some of these visionary men asserted, that the philosopher's stone was this wonderful panacea.
8. Few readers need be informed, that the researches for the philosopher's stone, and the universal remedy, were, at length, abandoned, as fruitless and visionary; yet the numerous experiments which had been instituted on these accounts, were attended with the incidental advantage of a considerable dexterity in the performance of chemical operations, together with the discovery of many new substances and valuable facts, which, without these strong incentives, would have remained, at least, much longer in obscurity.
9. Although none of the medicines, produced in the chemical laboratory, answered the chimerical expectations of the chemists, in curing all diseases, and in rendering the perishable body of man immortal, yet they proved sufficiently valuable in the healing art, to command the attention of the profession all over Europe. The adoption of chemical medicines, however, was, at first, everywhere opposed, either as unsafe remedies, or as being inferior in efficacy to those which had been used for so many centuries.
10. These prejudices having given way to the light of experience, chemical medicines came, at length, to occupy a conspicuous place in the Materia Medica; and their value within the present century has become still more manifest. One of the most useful branches of chemistry, therefore, is to make the various preparations used in the medical art.
11. The most efficient agent in the introduction of chemical medicines, was Theophilus Paracelsus. This singular individual was born near Zurich, in Switzerland. Having studied chemistry under two masters, he commenced a rambling life, in pursuit of chemical and medical knowledge; and, having visited Italy, France, and Germany, where he met with many whimsical adventures, which contributed greatly to advance his reputation, he was elected, in 1527, to fill the chair of chemistry, in the University of Basle.
12. One of the first acts of this arrogant professor was to burn, with the utmost solemnity, while seated in his chair, the works of Galen and Avicenna, declaring to his audience, that if God would not impart the secrets of physic, it was not only allowable, but even justifiable, to consult the devil. He also treated his contemporaries with the same insolence, telling them, in a preface to one of his books, that "the very down on his bald pate had more knowledge than all their writers; the buckle of his shoes more learning than Galen and Avicenna; and his beard more experience than all their universities."
13. It could not be expected, that a man with such a temper could long retain his situation; and, accordingly, he was driven from it, in 1528, by a quarrel with those who had conferred the appointment. From this time, he rambled about the country, chiefly in Germany, leading a life of extreme intemperance, in the lowest company. Nevertheless, he still maintained his reputation as a physician, by the extraordinary cures occasionally effected by his powerful remedies; although his failures were equally conspicuous.
14. But the most signal failure of his remedies occurred in his own person; for, after having boasted for many years of possessing an elixir which would prolong life to an indefinite period, he died, in 1541, at Salzburg, with a bottle of his immortal catholicon in his pocket. The medicines on which Paracelsus chiefly relied, were opium, antimony, and various preparations of mercury. He has the merit of applying the last, especially, to cases in which they had not been before used; and upon this circumstance, his great reputation depended.