In the whole canton over which it hovered, a hissing noise like that of a stone discharged from a sling was heard, and a multitude of mineral masses were seen to fall to the ground. The largest that fell weighed 17-1/2 pounds; and the gross number amounted to nearly three thousand. By the direction of the Academy of Sciences, all the circumstances of this event were minutely examined by a commission of inquiry, with the celebrated M. Biot at its head. They were found in harmony with the preceding relation, and reported to the French minister of the interior. Upon analyzing the stones, they were found identical with those of Benares. The following are the principal facts with reference to the aërolites, upon which general dependence may be placed. Immediately after their descent they are always intensely hot. They are covered with a fused black incrustation, consisting chiefly of oxide of iron; and, what is most remarkable, their chemical analysis develops the same substances in nearly the same proportions, though one may have reached the earth in India and another in England. Their specific gravities are about the same; considering 1000 as the proportionate number for the specific gravity of water, that of some of the aërolites has been found to be, Ensisheim stone 3233 Benares 3352 Sienna 3418 Gassendi's 3456 Yorkshire 3508 Bachelay's 3535 Bohemia 4281. The greater specific gravity of the Bohemian stone arose from its containing a greater proportion of iron. An analysis of one of the stones that fell at L'Aigle gives: Silica 46 per cent Magnesia 10 " Iron 45 " Nickel 2 " Sulphur 5 " Zinc 1 "