In later times there have been a few believers in transmutation. In the year 1782, Dr. Price, of Guildford, by means of a white and red powder, professed to convert mercury into silver and gold; and he is said to have convinced many disbelievers of the possibility of such a change. His experiments were repeated seven times before learned and intelligent persons, who themselves furnished all the materials except the powders, which were to operate the transmutation. These powders were in very small quantity. By whatever means it may have been accomplished, it is certain that gold and silver were produced. But, admitting that, with respect to its production, Price was an impostor, it is indubitable that he must have been in possession of one valuable secret, that of fixing mercury, so as not to evaporate in a red heat. Price published an account of these experiments, but stated that he had expended the whole of his powder, and that he could not obtain more, except by a tedious process, which had already injured his health, and which, therefore, he would not repeat. He died in the following year, and his death was attributed to his having swallowed laurel-water, in order to evade further scrutiny and the detection of his imposture. The fact of his having poisoned himself is at least doubtful. Another true believer in the mysteries of this art, says Mr. Brande, was Peter Woulfe. He occupied chambers in Barnard’s Inn, when he resided in London. His rooms, which were extensive, were so filled with furnaces and apparatus, that it was difficult to reach his fireside. A gentleman once put down his hat, and never could find it again, such was the confusion of boxes, packages, and parcels, that lay about the chamber. Woulfe had long vainly searched for the elixir, and attributed his repeated failures to the want of due preparation by pious and charitable acts. Some of his apparatus is said to have been extant since his death, upon which are supplications for success, and for the welfare of the adepts. He had an heroic remedy for illness: when he felt himself seriously indisposed, he took a place in the Edinburgh mail, and, having reached that city, immediately came back in the returning coach to London. He died in 1805.