or more of all these classes will be found in the foregoing pages. It will be seen, from the record of their lives, that the delusion was not altogether without its uses. Men, in striving to gain too much, do not always overreach themselves; if they cannot arrive at the inaccessible mountain-top, they may perhaps get half way towards it, and pick up some scraps of wisdom and knowledge on the road. The useful science of chemistry is not a little indebted to its spurious brother of alchymy. Many valuable discoveries have been made in that search for the impossible, which might otherwise have been hidden for centuries yet to come. Roger Bacon, in searching for the philosopher's stone, discovered gunpowder, a still more extraordinary substance. Van Helmont, in the same pursuit, discovered the properties of gas; Geber made discoveries in chemistry which were equally important; and Paracelsus, amidst his perpetual visions of the transmutation of metals, found that mercury was a remedy for one of the most odious and excruciating of all the diseases that afflict humanity.
In our day little mention is made in Europe of any new devotees of the science, though it is affirmed that one or two of our most illustrious men of science do not admit the pursuit to be so absurd and vain as it has been commonly considered in recent times. The belief in witchcraft, which is scarcely more absurd, still lingers in the popular mind; but few are so credulous as to believe that any elixir could make man live for centuries, or turn all our iron and pewter into gold. Alchymy, in Europe, may be said to be almost wholly exploded; but in the East it still flourishes in as great repute as ever. Recent travellers make constant mention of it, especially in China, Hindostan, Persia, Tartary, Egypt, and Arabia.
