IN Prof. Nordenskjólds account of the Aerolitic Shower which took place near Hessle, in Sweden, on the 1st of January, I86Q, he mentions, asa remarkable fact, that stones weighing two pounds, which struck the ice of the Larsta-Viken, failed to penetrate, making holes only three or four inches deep in the ice and rebounding, (Vide the Academy, Dec.15, 1870.) The small velocity retained by these stones at the time of striking the earth is, doubtless, owing to the resistance of the air, and, consequently, is not an indication of the velocity which they had upon entering the atmosphere. Stones thus penetrating the atmosphere from interplanetary space, would be moving in a resisting medium under the joint influence of their original velocity of translation and the constant action of terrestrial gravity.