a substance discovered by Mr Meyer, and by him supposed to be a new metal; but Messrs Bergman and Kirwan have discovered that it is nothing else than a natural combination of the phosphoric acid with iron. Mr Klaproth of Berlin also came to the same conclusion, without any communication with Mr Meyer. It is extremely difficult to separate this acid from the metal; however, he found the artificial compound of phosphoric acid and iron to agree in its properties with the calx sideri alba obtained by Bergman and Meyer from the cold-short iron extracted from the swampy or marshy ores. The discovery of this substance, however, may be accounted an important affair in chemistry, as we are thus furnished with an immense quantity of phosphoric acid, which might be applied to useful purposes if it could be separated from the metal.