POPOCATEPETL, or the Smoking Mountain, as its name imports in Mexican, an active volcano of Mexico, in the state of La Puebla, 35 miles S.W. of the town of that name. It is cone-shaped, and rises to the height of 17,793 feet above the sea. From its base up to the height of 12,700 feet, it is covered with forests; but above that the mountain is quite bare, its sides being strewn with pumice, sand, and ashes, from the crater, and generally covered with snow. The crater is about a mile in diameter, and 1000 feet deep. Good sulphur may be obtained from it.