The meteoric stones already noticed, are not the only metallic bodies which are supposed to fall from the sky. In many parts of the earth masses of malleable iron, often of vast size, have been found. An immense mass seen by Pallas, in Siberia, was discovered at a great height on a mountain of slate, near the river Jenesei. The Tartars held it in great veneration, as having fallen from heaven. It was removed in the year 1749, to the town of Krasnojarsk, by the inspector of iron mines. The mass, which weighed about 1,400 pounds, was irregular in form, and cellular, like a sponge. The iron was tough and malleable, and was found to contain nickel, silica, magnesia, sulphur, and chrome. Another enormous mass of meteoric iron was found in South America, about the year 1788. It lay in a vast plain, half sunk in the ground, and was supposed, from its size and the known weight of iron, to contain upwards of thirteen tons. Specimens of this mass are now in the British Museum, and have been found to contain 90 per cent. of iron and 10 of nickel. Many other masses of iron might be mentioned, which, from the places in which they are found, and from their composition, leave no doubt as to their being of meteoric origin. The only instance, on record, of iron having been actually seen to fall from the atmosphere, is that which took place at Agram in Croatia, on the 26th May, 1751. About six o’clock in the evening, the sky being quite clear, a ball of fire was seen, which shot along, with a hollow noise, from west to east, and, after a loud explosion accompanied by a great smoke, two masses of iron fell from it in the form of chains welded together.