Abstract
On the 23th of April I learned, by a printed notice* sent to Mr. Knox, that a substance, which was announced as a new metal, was to be sold at Mr. Forster’s, in Gerrard-street. The mode adopted to make known a discovery of so much import­ance, without the name of any creditable person except the vender, appeared to me unusual in science, and was not calcu­lated to inspire confidence. It was therefore with a view to detect what I conceived to be an imposition, that I procured a specimen, and undertook some experiments to learn its properties and nature. I had not proceeded very far, when I perceived that the effects produced by this substance, upon the various tests, were such as could not be referred, in toto , to any of the known metallic substances. I immediately returned to Mr. Forster, and became possessed of the whole quantity which had been left in his hands for sale. I could not obtain any information as to its natural state, or any trace that might lead to a probable conjecture.

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