articles were not so expensive in Mexico, this alabaster might be profitably exported to Europe, where its extreme purity and clearness would probably ensure its preference to all indigenous qualities. Extensive salt works are carried on at Chila, Xicotlan, Ocotlan and Zapotlan. Some of the most remarkable geological characteristics of the Mexican Republic are found in the three celebrated mountains of Popocatepetl, Iztaccihuatl, and Malinche or Matlacueye, which lie in the State of Puebla. The latter of these, sometimes called La doña Maria, lies between the volcanoes of Puebla and those of Orizaba and Perote, but does not require special mention except as forming a striking and picturesque feature in the landscape. But the other two deserve our special notice. ASCENT OF THE VOLCANO OF POPOCATEPETL. The mountains of Popocatepetl and Iztaccihuatl border the State of Puebla on the west. The following account of the ascent of the former of these gigantic volcanoes is founded on the journal published in Spanish in May, 1827, by Messieurs Frederick and William Glennie, who were in the service of the British United Mining Company, and Mr. John Taylour, a merchant of the city of Mexico. On the 16th of April, 1827, the party left the capital early in the day, accompanied by their servant José Quintana, and, provided with barometer, sextant, chronometer, telescope, and other instruments, reached the village of Ameca, on the western slope of the mountain, where they halted for the night. On the 17th they continued their route, following the road to Puebla which leads through the gap of the two mountains, intending to go to Atlixco. In the highest part of the gap they took the road to the right which is called "_de los neveros_," (those who procure ice for the capital,) and having reached the limit of vegetation, which according to their barometrical measurements is 12,693 English feet above the level of the sea, they met with some men who informed them, that in this direction they could not reach the summit, nor prosecute their way to Atlixco on account of the great quantity of sand. With this information they returned to the road they had left, and reached the village of St. Nicolas de los Ranchos. On the following day they continued towards Atlixco. The road here edges along the eastern side of the mountain, skirting an extensive district covered with large rocks and loose stones. Having understood that the village of Tochimilco is nearest to the volcano, they determined to go thither to obtain information relative to the adventure. The Alcalde Don F. Olivares, who, 'though the owner of Popocatepetl, had never reached the summit, gave them all the information he possessed, offered to accompany them, and procured guides and carriers for their instruments. They appointed the next day to go to his Hacienda de St. Catalina, which is at the very foot of the principal mountain and belongs to that estate.